Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d76fb5d22f38a4b…

MALICIOUS

PDF

40.7 KB Created: 2020-08-10 13:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bbc387e8ee1c9a474520b5083c350854 SHA-1: 81f19f927a088319a7e858b7f3d2ab777027c937 SHA-256: 3d76fb5d22f38a4bb5960307d6394ebc1fe6997731b24e434fae184c8ff29630
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised with a keyword related to educational materials. The document body also contains numerous links to external PDFs hosted on various domains, suggesting a link farm or SEO poisoning tactic to improve search engine ranking for malicious content. The presence of a malicious redirector link indicates an attempt to lead the user to a malicious site.

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=mcgraw+hill+4th+grade+math+workbook+pdf In PDF document text
    • http://fafos.popkoproductions.com/uploads/1/3/1/4/131407469/zefefetufadura.pdfIn PDF document text
    • http://files.nigerianmeadows.com/uploads/1/3/0/8/130813317/fipagiga.pdfIn PDF document text
    • http://files.dvrealworldlearning.com/uploads/1/3/2/7/132712129/nimijesa_bonasamuwuwuf_babagafipiviwi.pdfIn PDF document text
    • http://files.nbmarysville.org/uploads/1/3/0/7/130739654/8708029.pdfIn PDF document text
    • http://files.michaelbrownslawoffice.com/uploads/1/3/1/4/131406762/xajixolaxexojobegu.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/1/0438/4037/2896/files/low_oxalate_diet_spanish.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fakuwonilojovaxibudebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/6103/9524/files/autogreffe_de_cellules_souches_hmatopotiques.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7063/5678/files/11779017330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5913/3081/files/50943597618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9175/3115/files/tatavarurivemotokaxib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0879/4525/files/59517088879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/vikigosaki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8461/9680/files/lorexiromonofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6798/1476/files/72248784186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8352/1445/files/korean_visa_application_form_file.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 8

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_off00005d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D82 5780 bytes
SHA-256: 0e687e9ba349f430585652046a5b701a6824048114341fa781898f5270f255bc
font_01_sfnt_off0000712d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x712D 10700 bytes
SHA-256: ce5c9eb64c32839c1e7a451830d40ae5fbc9bc5dc40e5d470c17d5231e02d019

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