Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3100986a8c67857…

MALICIOUS

PDF

53.0 KB Created: 2020-08-05 11:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 662197f02c693908b57f901be1789c53 SHA-1: 1ddb914f54881d196d9d81560dcba5801baf3ba3 SHA-256: f3100986a8c67857566a82d5026466a276db5236ff1578586e0b612226a3e399
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=analytical+paper+example+pdf', is flagged as pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting it is an 'analytical paper example pdf', likely a lure to encourage clicks. The presence of a link farm and a malicious redirector indicates a phishing 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.ru/pify?keyword=analytical+paper+example+pdf In PDF document text
    • http://files.zsystemsorder.com/uploads/1/3/0/7/130738993/faxubowikuguj.pdfIn PDF document text
    • http://files.rossflemingdesign.com/uploads/1/3/2/7/132740193/2820fc0af29.pdfIn PDF document text
    • http://files.udrentalsspp.com/uploads/1/3/1/1/131164097/332f482681b6.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/1/0427/9474/6023/files/kaweni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6868/5464/files/xudodomovosigezas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9765/3397/files/caderno_de_encargos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9191/0038/files/mewonosabekozipisudutekak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9899/5878/files/2632752895.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/45388366577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/karla_spice_videos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9499/0231/files/gifuwuzoduwomofaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40948382406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8181/7495/files/aimbot_for_shell_shockers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9753/8203/files/11635847132.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 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_off000091d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91D1 5284 bytes
SHA-256: 5c9902e133b7d29fb817b1254904b0f08a0f905e4eace2029ff75787479c0ca3
font_01_sfnt_off0000a3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3C9 10376 bytes
SHA-256: 2e1016c6e55bc375e851b612a44f9cd8df18124a5d3d34c0dd5b571c470cba31

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