Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba53870fc7fa44c…

MALICIOUS

PDF

52.1 KB Created: 2020-11-02 04:43:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: b3e78d3dcc3e5d18a109eb0538d85944 SHA-1: 5ab436ba22452b06a58cdbd04c4895fd822bfcec SHA-256: 9ba53870fc7fa44c859ab8ceaabab82e1d83afff129ad8fcdf449c822ec59641
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://gettraff.ru/aws?keyword=instructions+on+fitting+snap+on+smile In PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/5650151.pdfIn PDF document text
    • https://vixeroniwemeful.weebly.com/uploads/1/3/0/7/130740086/jibebepuxapupumus.pdfIn PDF document text
    • https://bezebaterizijir.weebly.com/uploads/1/3/1/3/131384714/perejorem.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/d96ddb407408.pdfIn PDF document text
    • https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/02668db53e6bd.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/kazuwob.pdfIn PDF document text
    • https://jomimufigaz.weebly.com/uploads/1/3/4/3/134319247/dozebota.pdfIn PDF document text
    • https://finejorokisitoj.weebly.com/uploads/1/3/4/4/134495390/mogeravejegi.pdfIn PDF document text
    • https://purolejomi.weebly.com/uploads/1/3/0/7/130776639/cda762.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/zesegidewu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b18a9d24-9d5d-4f5e-b77e-37d49953bc68/32282349049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b3cb411-0ecb-4e6d-8ab3-aafd355ea4e4/kigawisimufejuxesufusuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f5dbc9c-3b2a-459a-908d-a713c3936fcd/9472540517.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000693a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x693A 5156 bytes
SHA-256: c9e21daac8fbad800c637fa11e11604aff7ba468a91d0539951f63f5c3b7b296
font_01_sfnt_off00007aa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA3 10972 bytes
SHA-256: 1a13ee5ccff39296afd91b5bc8714630c4956681264e0f73433fbee367dd2586
font_02_sfnt_off0000a00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA00F 16168 bytes
SHA-256: 0216150ac0e5ade23b072752459620ec704bdac01526bfbadd96d51f96873ef3
font_03_sfnt_off0000b516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB516 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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