Malicious PDF — malware analysis report

Static analysis result for SHA-256 df6b855c4fe5a039…

MALICIOUS

PDF

39.9 KB Created: 2020-08-04 05:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2bc124935a7e47050694fd8773b83e42 SHA-1: 6b17ea631fdad51a1d76e5d9da249f230ff7d50d SHA-256: df6b855c4fe5a0394164a138bac9257337867dc3aed4703cb4476a0d64077b91
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to a URL known for malicious activity. The document body, though heavily obfuscated, contains the same malicious URL and numerous other URLs, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness, and the PDF structure itself contained multiple embedded links.

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.cc/pify?keyword=vision+ias+current+affairs+august+2020+pdf+in+english In PDF document text
    • http://files.nicolemarshallphotography.com/uploads/1/3/1/4/131438324/5517122.pdfIn PDF document text
    • http://files.sarahkyriazis.com/uploads/1/3/0/8/130813855/vasikegalenakexow.pdfIn PDF document text
    • http://files.clarencelam.com/uploads/1/3/0/7/130776462/mepapu.pdfIn PDF document text
    • http://files.intrepidresearch.org/uploads/1/3/1/0/131069859/kutafumales.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/1/0429/2457/2835/files/25026054788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1179/2286/files/atomic_structure_chemistry_ncert.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78394199391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8731/4590/files/80892872224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5934/7618/files/saga_frontier_rom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2646/3385/files/tixosodasomivafoposu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1928/0288/files/71838436910.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/3621/6229/files/ubuntu_14._04_source_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/jenenotibaduzexilemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4012/6629/files/85403757629.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/80034055325.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_off00004c7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C7A 5656 bytes
SHA-256: 9dba1126e96ea3dffb6101b8396fb1dddbf9414d5f2ed9fb22f0b311cff522ae
font_01_sfnt_off00005fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB1 9936 bytes
SHA-256: e25aacf30a3c17de9bca041731db961d7a00ddab3d2db849f6ead737f07d83c1
font_02_sfnt_off00008205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8205 3768 bytes
SHA-256: 40d7b50bbc95d46a8a61317ebb9400810945c86ef3dc95aeeabc42da7040d483

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