Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce1262a1e335a5c…

MALICIOUS

PDF

46.5 KB Created: 2020-10-17 08:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 71dbad5126924ac2e4c531dd04455b61 SHA-1: 5d2aa90cfa620149d33a5aeb2b7bcafaefb6c1be SHA-256: bce1262a1e335a5c632a60bc4ea46da0e7f8e58bfcfe710322457bf2ce1f7a10
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to disposable hosting and redirector services, indicating a link farm designed to distribute malicious content. The presence of a link to a known malicious redirector (ttraff.me) and the ML classifier's high confidence score strongly suggest malicious intent. The document body, though partially garbled, contains text related to setting IP addresses, likely a lure to encourage clicks on the embedded links.

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://ttraff.me/123?keyword=set+ip+address+manually+ubuntu+server In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/dolopitubolagu.pdfIn PDF document text
    • https://mogijoduvide.weebly.com/uploads/1/3/0/8/130814471/buxumon_fazit_butifumaju_gipirulidafefe.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1158663.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/4102594.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/32e063a95e.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/2697538.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/roriturosiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f87fdb58a60a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377403/normal_5f89deeac0f76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f8a24ae6be1e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/4646/1336/files/mewimoladexepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0380/5847/files/relampago_in_spanish.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7057/8070/files/82125171466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8173/7397/files/kupulidoriv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49849605-495e-4aa6-92ee-1a3e25c5061f/16564887086.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fe4853d-f5ab-4253-9b9c-6ad2e659c8ef/46743465341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7206cfb0-8c65-419a-afae-0bcbf7afd491/94452602880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bb909a6-74e8-41c7-aea1-f6eaacf573c6/tuwegox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6db13d9f-d0c7-4f48-ba49-3f5b32c415b2/pifonobugudawivuwutiwef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec5408d7-e9b3-4aa2-bc8d-0a94aab61143/9243868031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4023bab-29aa-4d14-8a4e-203359ed0bed/mumopegodukobuvoluvuwazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94caa700-1732-491b-b497-875c6a0ceb9d/51181045890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/025e23c6-5e41-46b9-97fb-7333907478db/48965388329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7bd98e1-8807-4b1b-8fa7-050d608889ef/49469127590.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7533 5512 bytes
SHA-256: 0aa83f94dd418f3ab2654ea87e8b715ec042cf566cba424cf29840379ecf307e
font_01_sfnt_off000087d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D6 10700 bytes
SHA-256: ba995b4fafc5eff0c5e5263a99bfbd57d7c4de16d6e23b598920490b0756eab1

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