Malicious PDF — malware analysis report

Static analysis result for SHA-256 c365101f4aca522b…

MALICIOUS

PDF

40.1 KB Created: 2020-07-30 20:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 350f3742eddf80f003c76275d1e04f61 SHA-1: a83d21386be75f610e56c1bf815d20bd26be6223 SHA-256: c365101f4aca522b95768428800ec024931701e5d77ba4f22798cf09aa2d97ad
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged as malicious by an ML classifier and contains a significant number of embedded links, including one pointing to a known malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a link farm strategy, likely to obscure the true malicious destination. The presence of multiple Shopify URLs, some confirmed benign and others unknown, suggests an attempt to blend in with legitimate content while distributing malicious links.

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/wb?keyword=azolla%20zs%2032%20pdf In PDF document text
    • http://files.bright4seasons.com/uploads/1/3/0/7/130740256/pabekow_juzazovak_jimitotonob_jadalixopalesu.pdfIn PDF document text
    • http://files.mnmcomber.net/uploads/1/3/0/8/130813144/93d4b.pdfIn PDF document text
    • http://files.kaetebrittinshaw.com/uploads/1/3/1/3/131383949/05bfcd26783f839.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/1/0428/7892/7014/files/xakunaxumotizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3545/7696/files/67492042603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/vusaxulelajep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/1125687405.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5491/4981/files/44520653537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1987/9068/files/danilukitiwegemojak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/wozumokizopuriputoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7540/3929/files/buzoxusujovenume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0124/2015/files/denorejetigejalibuk.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_off000057ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57CE 4708 bytes
SHA-256: ba8a4b47dfd9a8f73452ad3fa7fdd927c2dbd778e9530e4c1e80865b3033cb59
font_01_sfnt_off000067d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D9 13460 bytes
SHA-256: 5b01eed6e80ab4710b3b91a3c2eff2eda9534e293800d7eaca65c999b09c8fff

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