Malicious PDF — malware analysis report

Static analysis result for SHA-256 5129f3241d8a2686…

MALICIOUS

PDF

46.3 KB Created: 2020-08-24 18:27:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2841810310c1d0427c5f63b2256834d9 SHA-1: 4081b358321bd40cce4e2c2a3f8071e5f08608b4 SHA-256: 5129f3241d8a26864114d64d7a7686a58a7b87431ab2758ff46fe7c799fefec4
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The primary redirector URL is https://ttraff.cc/pify?keyword=factors+affecting+anaerobic+digestion+pdf, which likely leads to further malicious sites. The document body itself is heavily obfuscated, but the presence of numerous external links and the critical heuristic firings strongly indicate a link farm or redirection attack.

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.cc/pify?keyword=factors+affecting+anaerobic+digestion+pdf In PDF document text
    • http://naraxol.operationshapeup.com/uploads/1/3/1/3/131380213/jubabirejisiw-lofisu.pdfIn PDF document text
    • http://files.mrhso.org/uploads/1/3/0/7/130738559/b04139ca976590.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/1/0465/3193/6414/files/gesto_da_tecnologia_da_informao_ead_estacio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8771/4721/files/fodoni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8122/6657/files/how_to_become_a_woman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5320/1046/files/icloud_icon_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1937/0659/files/46158425941.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/3024/3484/files/11173100683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2535/0301/files/54654595929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7035/7661/files/adobe_audition_cs6_tutorials.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3461/5708/files/tutedeno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3745/7574/files/zowopisagava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4115/2421/files/61355062906.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 6

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_off00007587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7587 5384 bytes
SHA-256: 73a9564893f7d5a1306fbdd467f16ad59839fe8485f39e8af0251c9dac1ec49e
font_01_sfnt_off000087dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87DC 10656 bytes
SHA-256: 62ed17866c28f5448e991caacba2c185e48e436b2f1dc080a39a27064572daf0

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