Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b81a9cfcfa9fbd4…

MALICIOUS

PDF

45.0 KB Created: 2020-08-07 15:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1f039eb470f622c0b45e4926173f550b SHA-1: 7ce49260acffd93a7a1f2342d02a341aa6e205cd SHA-256: 5b81a9cfcfa9fbd4d907fc10e090306d4aad02f803a3bb76b66bf1a73d3d4384
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) identified as malicious. The document body, though heavily obfuscated, includes the same redirector URL and several Shopify-hosted PDF links, suggesting a link farm or SEO poisoning tactic. The primary intent appears to be directing users to malicious infrastructure through a deceptive lure.

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=fonctionnement+de+l+appareil+g%25C3%25A9nital+f%25C3%25A9minin+pdf In PDF document text
    • http://vezer.naileditdoc.com/uploads/1/3/2/8/132815002/fasazanarogu.pdfIn PDF document text
    • http://files.anyball.info/uploads/1/3/2/7/132710759/0362793e98800.pdfIn PDF document text
    • http://files.danesinaustralia.com/uploads/1/3/1/3/131379730/bb9c86f2d3.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/1/0432/9111/5678/files/hectares_to_acres_table.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6241/1935/files/69112879463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5569/3470/files/98030648765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2133/4690/files/54642930413.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/radar_anti_jamming_techniques.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3071/6314/files/nfpa_58_2014_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/95787186091.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4760/0807/files/73811168632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2544/0669/files/29218777247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53059057271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/55743014109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8203/9964/files/kawesozifipamodididuxot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1507/7022/files/income_and_substitution_effect.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
🗂 Part of campaign: danesinaustralia.com 3 samples

Related samples 3

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_off00006be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE3 5396 bytes
SHA-256: 332c63403511d813986213ed8f5cf7931a3b8e0446e0fc7174d859143bf2d801
font_01_sfnt_off00007de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE8 12376 bytes
SHA-256: 6b834ff129c1ab1dbff8e6b73004cc5c35df3b1b7308ecbe9d1b591d32dac6e0

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