Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b846938bbf5370a…

MALICIOUS

PDF

46.2 KB Created: 2020-08-04 21:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1abfdfbb6b77ea541a8e8e302b245c09 SHA-1: b58449d09ea5a3f2083b6a712df5525001632a80 SHA-256: 3b846938bbf5370a611d35fc9ff91d1c9b0b915b8f3d12aded74196661b84c6d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for SEO manipulation or to direct users to potentially harmful content. No scripts were extracted from this sample.

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=carl+jung+liber+novus+pdf In PDF document text
    • http://files.kossecc.org/uploads/1/3/2/6/132681969/4110097.pdfIn PDF document text
    • http://files.tickboxhappy.com/uploads/1/3/2/6/132682685/0e3cd3.pdfIn PDF document text
    • http://files.bbqgrillsandislands.com/uploads/1/3/0/7/130776239/gupav.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/1/0433/0687/7080/files/6338597663.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3956/2645/files/annihilation_of_caste_in_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6879/0686/files/vubozujesibukevopan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7641/8720/files/p90_nutrition_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5815/1070/files/gonem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84005007378.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/ryobi_4_cycle_blower.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kufanagapaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5555/4458/files/77639488757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6630/8246/files/42318328542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/78068409119.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/pefakoxapikomewaw.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_off0000785f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x785F 5392 bytes
SHA-256: e0a500f2d90a23accd094c363525813a011d9ce5efa305f7726d82078f5aa4a1
font_01_sfnt_off00008ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC6 9820 bytes
SHA-256: d56709d8de208db2902f49e6013406130ed673d8073ec4b47872ee5bd9aa061c

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