Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f0118a2bfbb7f13…

MALICIOUS

PDF

44.3 KB Created: 2020-08-16 21:08:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 389bd58b1cdf878c261765ae073253c9 SHA-1: 136cf98960622e5067a3e29589f70718a0f98448 SHA-256: 6f0118a2bfbb7f13deda7c74bc145f13cb3017551d16c937c330ebb9e2950ded
194 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains multiple heuristics indicating it's a redirector and link farm. The document body, though heavily obfuscated, contains a URL that points to a redirector service, which in turn links to numerous other PDFs hosted on Shopify. This suggests a tactic to drive traffic to potentially malicious or spam content, masquerading as legitimate downloads.

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=encyclopedia+of+computer+science+4th+edition+pdf In PDF document text
    • http://files.dashtangles.com/uploads/1/3/1/6/131606343/tubinid.pdfIn PDF document text
    • http://lenipi.stbernardsnakerun.org/uploads/1/3/1/3/131398140/5802522.pdfIn PDF document text
    • http://files.servingthesouthbay.com/uploads/1/3/1/4/131437532/wuwetuzulekubi-xobeforor-pidiluvojikiz.pdfIn PDF document text
    • http://files.rotaryclubofwindsor.org/uploads/1/3/0/8/130813111/8685883.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/1/0430/0803/2922/files/ruwalupeluworofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1938/5502/files/codify_parametric_and_computational_design_in_landscape_architecture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0867/2423/files/88426319488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17844710077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/small_to_excel_converter_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6851/2669/files/fitibudepemapamag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6904/6935/files/ffxiv_shirogane_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9636/7511/files/77463896162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2887/9272/files/the_barefoot_investor_audible.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 4

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_off00006d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D55 5544 bytes
SHA-256: bc625da770e1333c66b464745da1d57c1c8f64af12d24b57e2cf051c2afdda42
font_01_sfnt_off0000800f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x800F 10984 bytes
SHA-256: 56d575a1e7887bf4cce361c14bc6661156a999533592d38ad2426c190f826287

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