Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b56d991ad8a3da8…

MALICIOUS

PDF

38.9 KB Created: 2020-08-19 20:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3a8cac459963b4f5d7ddb9205ea56d53 SHA-1: 185eecf5b326d492443295d2d8103d8b51408395 SHA-256: 5b56d991ad8a3da8057371ad52d31c0f071be751690065bc83fb79ff64b42d6d
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to a malicious URL, disguised as a vaporizer manual. The ML classifier strongly indicated maliciousness. The embedded links likely serve to distribute malware or phish for credentials by leading users to malicious websites.

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=apx+wax+vaporizer+manual In PDF document text
    • http://files.turkeysmusical.com/uploads/1/3/1/0/131070938/2909785.pdfIn PDF document text
    • http://files.gay-lesbian-retreats.com/uploads/1/3/2/6/132696018/vofugerepamosen-fupawejewuvizuf-feruvaf.pdfIn PDF document text
    • http://jorosef.anti-agingbyrjxjelly.com/uploads/1/3/2/3/132303354/8686563.pdfIn PDF document text
    • http://xupival.coachmattaz.com/uploads/1/3/2/7/132741334/1236797.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/1/0429/7054/6335/files/pujijusowijafowiwofuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/5659/5871/files/tonebor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0607/4778/files/briggs_myers_personality_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7994/9718/files/dumemeke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9727/5033/files/honing_guide_lie_nielsen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/45798769107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8948/4189/files/31845740694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/8967/7736/files/tremble_guitar_chords.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_off00005138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5138 5044 bytes
SHA-256: 6d128205f8247927415872af6af2c11ee322493fef5f80b79c6a809e47e3b663
font_01_sfnt_off00006262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6262 2040 bytes
SHA-256: 3776bbe9e1f2932306d44f0af687ce895782eef4655133c9f456e70fce2c1196
font_02_sfnt_off00006be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE6 10164 bytes
SHA-256: a99dfb4e3d30c04a0ed0671d9749792501d4615f382a58f4b8b4aac756144255

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