Malicious PDF — malware analysis report

Static analysis result for SHA-256 b511be60d6892a9e…

MALICIOUS

PDF

45.2 KB Created: 2020-08-19 19:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 34dbfa6bc9f08572d9e6cf291404238c SHA-1: cb963ac481029381898270b8ddf67228fce052a6 SHA-256: b511be60d6892a9e6c58fbf2e8ab02b729c5b2b21f5c84175155c6ebecc76d1f
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector infrastructure, specifically 'ttraff.ru', which is used to obscure the final malicious destination. The document body, though heavily obfuscated, contains text related to 'Aflac short term disability form pregnancy', likely a lure to entice users to click the malicious link. The ML classifier 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=aflac+short+term+disability+form+pregnancy In PDF document text
    • http://files.thetenminuteactivist.com/uploads/1/3/1/4/131407227/3875968.pdfIn PDF document text
    • http://files.wallaceclassroom.com/uploads/1/3/2/3/132303147/nemuzovademake.pdfIn PDF document text
    • http://rilirijit.pergusconsulting.com/uploads/1/3/0/7/130775540/1357367.pdfIn PDF document text
    • http://files.monika-schnitzer.com/uploads/1/3/1/4/131452959/zabadebavodesawona.pdfIn PDF document text
    • http://files.beyondpowerandcontrol.com/uploads/1/3/1/4/131437736/8570430.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/1/0434/2172/8930/files/future_simple_exercises_perfect_english_grammar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/affinity_designer_ipad_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/amandla_stenberg_songs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/9771/3829/files/pulsar_watch_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6244/3683/files/1003207503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8999/1582/files/puvetifodixava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/beacon_house_developmental_trauma.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 7

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_off00007176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7176 5800 bytes
SHA-256: f2b8895fa6d70bf3d89cdf92da40240e13926dbe839feb32dd3e97c40a3814a6
font_01_sfnt_off0000850d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x850D 10212 bytes
SHA-256: 38329b3f6694c3c8ebaee775f129855a2133293dd001ef447084e22c2681adfe

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