Malicious PDF — malware analysis report

Static analysis result for SHA-256 6991c94991937a31…

MALICIOUS

PDF

38.5 KB Created: 2020-08-02 02:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7d3c4feff1822ef6f9b5dde962357f07 SHA-1: 9a35c7761d75cd6dbaf0082472ea0dd906b32798 SHA-256: 6991c94991937a3140f8c114d94fe8e3b44c4b87ef455a0b389cb47953b18f5c
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which point to a redirector service known for malicious activity. The document body and embedded links suggest a lure to download a reference manual, which is a common tactic for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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=the+gregg+reference+manual+11th+edition+pdf In PDF document text
    • http://files.wingspan-wellness.com/uploads/1/3/0/7/130775563/wamovos.pdfIn PDF document text
    • http://files.rusticchalkdecorshop.com/uploads/1/3/0/7/130775382/906b08689b464.pdfIn PDF document text
    • http://files.marenjmiller.com/uploads/1/3/1/0/131071137/tememazolibix-fopapugesaj-kokidifosaw.pdfIn PDF document text
    • http://files.gr8tjob.com/uploads/1/3/1/8/131856815/6333714.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/1/0434/1848/4888/files/tuxusari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0053/4952/files/nozusurojoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3095/3630/files/kuviwolutofidideloba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3411/5233/files/bodatokoxop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3563/8425/files/6495239447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/80392407466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6070/6971/files/15021823248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/godupaporigaxowefureraso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4659/2924/files/dodisu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9501/4042/files/kebog.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_off00005387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5387 5392 bytes
SHA-256: 41354660de23f99e2ebf17e99158024a70e9244584138b94b7551a2301481aa6
font_01_sfnt_off000065bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BF 13932 bytes
SHA-256: 50ae77bc8afe56a3f836b7e0e73f836685060b7f894a73e58eb7b2396df91e53

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