Malicious PDF — malware analysis report

Static analysis result for SHA-256 834d91bc9ff91eb0…

MALICIOUS

PDF

39.7 KB Created: 2020-08-06 04:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 090b04a1699e006d90ecb01c7c687063 SHA-1: 0c9b2d6517ec3a8d09eab3e7d20f8a70739ab3b6 SHA-256: 834d91bc9ff91eb0f2bf3fb2d214a6c2aaca1ab97bd43a8a38e80c8d697bfdc6
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, suggesting a phishing or malware distribution attempt. The document body, though partially obfuscated, contains a URL that appears to be part of this lure. The presence of many external PDF links indicates a link farm strategy, likely to improve search engine ranking for malicious content or to distribute payloads.

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=qcm+atomistique+paces+pdf In PDF document text
    • http://favoliwa.drcots.com/uploads/1/3/1/4/131407148/korimuxewesuserupe.pdfIn PDF document text
    • http://files.friendsofcookforest.org/uploads/1/3/2/8/132814958/latetazenas.pdfIn PDF document text
    • http://files.kvag.net/uploads/1/3/0/7/130776346/3184610.pdfIn PDF document text
    • http://files.littletonpreschool.com/uploads/1/3/2/6/132682892/74c8580.pdfIn PDF document text
    • http://files.faithconnectionsonmentalillness.org/uploads/1/3/0/7/130739155/2543682.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/1/0434/6213/1869/files/zafilifegisinofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7093/0600/files/giwemofixasopagot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4754/1146/files/final_fantasy_15_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/merutazibixojoforazude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6749/0975/files/801951851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/43988142080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nenipuwewof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3748/2405/files/79525585185.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6710/3645/files/27135220896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2560/3488/files/how_to_delete_twitter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8687/9651/files/9436179243.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D31 5360 bytes
SHA-256: e20e40a6b714e8203cfd674f88533f79811ae5bb92a4ca57cfd2dc6732184cab
font_01_sfnt_off00006f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F59 10240 bytes
SHA-256: 02b7e3edc6db9a02510502f084ad2592b8c691b1973b49e610d7f5c26780fa7d

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