Malicious PDF — malware analysis report

Static analysis result for SHA-256 a74f6ad616234477…

MALICIOUS

PDF

36.6 KB Created: 2020-08-21 07:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 392e3bd201300735f70af71215b3a1a0 SHA-1: 9a170a075f91fdee5de1debf2d2e519ce24efa0f SHA-256: a74f6ad616234477b4eefb95ba7db367e6652a368ee99e357256132a11999821
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm and a specific redirector URL that is flagged as malicious. The document body, though heavily obfuscated, contains references to the malicious URL and benign-looking PDF filenames, suggesting a lure to download further malicious content. The ML classifier also strongly indicated maliciousness.

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=game+dev+tycoon++ios In PDF document text
    • http://fojiv.trikalashelterdogs.com/uploads/1/3/0/7/130738902/5266317.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/1/0435/9385/9231/files/gogepug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/laporan_pendahuluan_anoreksia_geriatri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6260/6489/files/52195778069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0134/0319/files/49285745430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8298/7173/files/nakugiron.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4750/8385/files/ccna_security_study_guide_exam_640-_553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9501/5831/files/19070976402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0416/4257/files/cara_menggunakan_multitester_analog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/47652073110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/disunirolojilom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6013/2005/files/31038956778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3704/0538/files/antioxidant_defense_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2831/5293/files/99335386356.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0432/1184/files/44602450798.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000526a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x526A 5148 bytes
SHA-256: fbc9f9cbb23d329b4508124473bd725e07c89bda4dec0f778d370162b5e562e4
font_01_sfnt_off000063f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F3 9956 bytes
SHA-256: 68d285ca61ea2b81f5c5b017db852d0a1ebe2aa01a8779ce6262c5b628b2bac9

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