Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ac97caf8e6d5c0…

MALICIOUS

PDF

50.3 KB Created: 2020-08-15 21:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f3be01fa3982e4c033404bdc557ae556 SHA-1: 006161c6d5977725f7e89ba10a41c97372e06c48 SHA-256: f7ac97caf8e6d5c0004f6dda2e296e372c60fabf6450ae6782c4ba9d533a4168
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify. One of the primary links, 'https://ttraff.com/wb?keyword=general%20science%20notes%20pdf%20in%20tamil', is identified as a malicious redirector. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic suggests a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/wb?keyword=general%20science%20notes%20pdf%20in%20tamil In PDF document text
    • http://files.upstreamprevention.org/uploads/1/3/0/8/130814112/4072026.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8606/2495/files/we_are_fighting_dreamers_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/japag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/64989875230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6481/1935/files/73597633883.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4265/8711/files/6th_grade_fun_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5782/4419/files/19469794004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1345/1430/files/ukulele_worship_songs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5149/9170/files/purazikarodikelamowubup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/65288345065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5552/1687/files/kaduroredud.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 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BF 5332 bytes
SHA-256: fb6ebab51545a2e19e8c6d7c2a6c249f7ac39f64d8ca2f8fb9ccbd9b16e45f1f
font_01_sfnt_off000073c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73C7 7736 bytes
SHA-256: 31cea9ecb63c112c672cb7555e21ce04c1a485594e1a6e9c0e2ca6b464e09dc4
font_02_sfnt_off00008a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A51 16364 bytes
SHA-256: 6d27518c6fb871e843dc4e974aee253e7b274ad028cb76e246c1b1b4c232e6ab

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