Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b4b8501c2e85263…

MALICIOUS

PDF

40.7 KB Created: 2020-08-02 17:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1806dd3d73074f4dd8166e48f3cf7028 SHA-1: 2b4661edfe6d21a98b9a6b9f0b5812c0c71366a4 SHA-256: 0b4b8501c2e85263fb4e13fcb1c04a2403066caff917df2927f5efe6ef747875
194 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, disguised with a technical support lure ('Corsair headset mic not working'). This redirector likely leads to a phishing page or malware download. The PDF also contains a large number of links, suggesting it's part of an SEO link farm to improve search engine ranking for malicious content.

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=corsair+headset+mic+not+working In PDF document text
    • http://files.greenbelthumanesociety.org/uploads/1/3/0/7/130776393/zaxerira.pdfIn PDF document text
    • http://files.tooreens.com/uploads/1/3/1/3/131378918/petigikosupivosal.pdfIn PDF document text
    • http://files.allsugaredup17.com/uploads/1/3/1/8/131857114/nilub.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/1/0435/4303/6053/files/gufibibax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3023/1712/files/63401852042.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4666/6389/files/remebedevukamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1780/3675/files/alternatives_to_premiere_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0595/8565/files/sebemavorupibabil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/zopapox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/ihk_berichtsheft_pdf_nrw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/kowurubin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/73610825822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/gibagovuferopesexiduboref.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9860/9566/files/wapakekejorudefup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5239/9777/files/nosoxezegubu.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 2

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_off000061bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BB 5380 bytes
SHA-256: 236bda596961e1ecff274de686c286d3516fb17f113582ddfeab89032a6d06f2
font_01_sfnt_off000073eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73EB 9944 bytes
SHA-256: 682653079bea8216540ff4b1f18ad47f73ea60f10b63fc7500b9f0854b322b0c

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