Malicious PDF — malware analysis report

Static analysis result for SHA-256 c08dd69b5b06d788…

MALICIOUS

PDF

51.1 KB Created: 2020-07-29 22:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a2ac300f4e23f557cc3ee166480348b6 SHA-1: 25d230a4150247e0a40d2deb797df0ed7cc0bb2e SHA-256: c08dd69b5b06d7880118c26758ff8983a4bc0185dee77198cd840c04efbee1a1
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.ru/pify?keyword=ataxia+pediatria+pdf In PDF document text
    • http://files.ewsrl.com/uploads/1/3/1/1/131163780/kovudatole.pdfIn PDF document text
    • http://files.islamandfeminism.org/uploads/1/3/1/8/131871453/jolupetemaki.pdfIn PDF document text
    • http://files.isaacfreight.com/uploads/1/3/0/8/130814329/rurer-duzesewekugef-vujoposateko.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/1/0433/4993/4229/files/verulozoniv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4141/5587/files/27597622038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/33374625424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/19761233990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6046/0706/files/jemalabasezanafapadizipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/58247892811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xoperesotojazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6929/9098/files/muwofigivajilanukurufag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0124/9955/files/11051264799.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8344/7968/files/zazuxutomap.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_off00008d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D3E 4456 bytes
SHA-256: 284762dfe88799da66b747ad5c9abd40343987f543d21481e0a74f9a75e972e8
font_01_sfnt_off00009c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C6E 10304 bytes
SHA-256: 9d717c3ac742adcbcefbc05d0f9b910ccdc1fd394425c81489279875f6ee415d

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