Malicious PDF — malware analysis report

Static analysis result for SHA-256 66818cc1953e869e…

MALICIOUS

PDF

54.7 KB Created: 2020-10-20 04:09:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 13a115a042be49eabc20596dfca7d9a8 SHA-1: 8476b108e1f350f7c971e8745432940ee5da8c8b SHA-256: 66818cc1953e869ea0c3bcb229804ce49251c23e9bd7df72906e9ca86111f57e
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to disposable hosting services and redirectors. The primary URL identified, 'https://ttraff.link/123?keyword=cicloalcanos+y+cicloalquenos+pdf', is flagged as a malicious redirector. The document's structure and content suggest it is designed to lure users into clicking these links, potentially leading to further malicious content or phishing attempts. No scripts were extracted, but the PDF's nature as a link farm is strongly indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.link/123?keyword=cicloalcanos+y+cicloalquenos+pdf In PDF document text
    • https://senobatupubem.weebly.com/uploads/1/3/1/4/131437889/d0b98e7b0c.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/roruj-fegedevovelere-zexomojikazi-rewubujelem.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/4699356.pdfIn PDF document text
    • https://wopeduvolevim.weebly.com/uploads/1/3/0/7/130776212/8285579.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/6615122.pdfIn PDF document text
    • https://kenilajapa.weebly.com/uploads/1/3/1/0/131069910/liwerono.pdfIn PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/3379728.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/sidobojugonuxexoz.pdfIn PDF document text
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/wiwaboza_nezizujine_tugewokakobex_mewedezoxudero.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f8bd411bfa95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376625/normal_5f8ca48b4357f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_5f8e0c846fca0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370541/normal_5f8b11cb8969c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384039/normal_5f8d6ef0bd0ba.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/zefegawi.pdfIn PDF document text
    • https://debasomi.weebly.com/uploads/1/3/0/7/130739769/18b3dc9062.pdfIn PDF document text
    • https://rabexowubomisuw.weebly.com/uploads/1/3/1/4/131407155/nedozetozeb.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/tusuwagejezoxi-pilazimuben-xosozefuxe-judaxegojojuxu.pdfIn PDF document text
    • https://ligofaxudatejot.weebly.com/uploads/1/3/0/7/130739538/rugavidoti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc79db85-387c-470e-8fcc-14795cb6b740/pekowikowelomivuliw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8ace083-4c2c-4ed4-be93-a0c826f6fe70/zajumafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3506/9096/files/ioun_stone_of_reserve_cost.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1790/3521/files/cub_cadet_ltx_1046_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3114/1783/files/salt_lake_stallions_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/naruto_shippuden_filler_arc_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1551/9912/files/98046042767.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9B 2996 bytes
SHA-256: 584582eab60209552b1fa2f88ff422caf6c2e0d48b6823e8901a3f1a570e531e
font_01_sfnt_off0000884d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x884D 5188 bytes
SHA-256: 82f2fdfbf02f4ee29e5bc0548872164d1d3aac99b08dc5e1674c7256236ea97d
font_02_sfnt_off00009a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A05 15612 bytes
SHA-256: a3cb6ce7a2b01bb1d7c5003e1710fe1bc346368b6620dcd654d63e31ed618cac

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