Malicious PDF — malware analysis report

Static analysis result for SHA-256 091e33ae39aace3d…

MALICIOUS

PDF

53.3 KB Created: 2020-08-21 07:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0b4772a766f0ecf55d903f20b54c0e2e SHA-1: 6ca1b6ed2376ac3a5b373537a1c110270e299bd2 SHA-256: 091e33ae39aace3d81e2cd68b0a3f88cc8bca728e314530c53d8d0721e5ef6cb
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector disguised as IELTS listening test answers, aiming to trick users into downloading further malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous external links points to a link farm or SEO abuse for phishing. No scripts were extracted, but the embedded links are the primary threat.

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.ru/pify?keyword=ielts+listening+book+9+test+4+answers In PDF document text
    • http://files.garnersoftware.com/uploads/1/3/0/7/130739284/4478271.pdfIn PDF document text
    • http://vesuj.carnivalglassworldwide.com/uploads/1/3/1/6/131637395/ferorizetuwufu.pdfIn PDF document text
    • http://files.nicholasliwag.com/uploads/1/3/1/3/131381612/47399.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/1/0435/5194/8963/files/7842787169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2915/0368/files/bikolerasifesonurafubum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0513/2456/files/85121864479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7034/8694/files/bob_woodward_fear_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9209/8716/files/running_average_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9116/3291/files/5129159766.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/10095585395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0625/4504/files/21118895354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7301/0845/files/buvulagirasexaxikovesadaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1657/5383/files/pifusanetikowidik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/filo_actinopoda.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_off000092f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92F0 5332 bytes
SHA-256: aede17e754bbba8d3f8f07f475eab084297132e3646f4c93c2b84f84d2d47fb0
font_01_sfnt_off0000a52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA52E 10376 bytes
SHA-256: b48342fffa9d5d70a926b2d7f97401f21412352f15e7744851ae773e1d4b9d96

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