Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4dc3f81e3fba541…

MALICIOUS

PDF

44.6 KB Created: 2020-08-19 03:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3b738e766bae58cf3945b26df8df2580 SHA-1: 3da56bd3670c5e28f65258790d033b5e63df7ee7 SHA-256: b4dc3f81e3fba5417ed0bb1a8f623ed33a2b6eb787b59e1bbe0f6f260219d891
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text referencing 'Bloons td 5 mod apk' and the malicious URL, suggesting a lure for users to download potentially harmful content. The presence of numerous links to Shopify-hosted PDFs, while many are benign, indicates a link farm strategy, likely to improve SEO for the malicious redirector.

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.com/pify?keyword=bloons+td+5+mod+apk+lenov.+ru In PDF document text
    • http://files.ardenandscott.com/uploads/1/3/0/7/130740166/vizekilolefevobu.pdfIn PDF document text
    • http://files.fbcmedford.org/uploads/1/3/0/7/130739831/totigavawu.pdfIn PDF document text
    • http://files.mossyrockfarm.ca/uploads/1/3/1/1/131163635/7286423.pdfIn PDF document text
    • http://files.simplegiftssyrupandsalmon.com/uploads/1/3/0/9/130969312/7823327.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/1/0431/0096/2977/files/pogisan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7107/7526/files/90833026029.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4703/3752/files/botanicula_android_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5969/2191/files/58113364560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3305/1814/files/vurosozawanagi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3417/1800/files/homelite_chainsaw_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1042/4985/files/battle_trip_red_velvet_kordramas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4351/1703/files/algebra_2_systems_of_equations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9536/7584/files/74004888945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7883/5606/files/nimupenebawuxowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/vegetarian_bodybuilding_diet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4276/5991/files/xajuwatime.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6478 2880 bytes
SHA-256: b90b109c34db9b2d961be312c0c64f13ba4f5af9c83d6ae4556a72cb7f468167
font_01_sfnt_off00006eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB6 5432 bytes
SHA-256: 6eaaaed5fb9cc22e98dfaff8b88ecdbb3a619717416bca5212b937eed222b6b2
font_02_sfnt_off00008125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8125 10592 bytes
SHA-256: 2d665cc50c0353533d5ac730de473befa57ca2ec32c59a25a05c2e50217fc1f2

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