Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e78251bb2457a2e…

MALICIOUS

PDF

45.3 KB Created: 2020-08-15 04:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cfa321d2ac694dfd0b0f4b46cb179059 SHA-1: 387c7295b76c8e9d21b690f43ff8995fd9297b94 SHA-256: 5e78251bb2457a2eea8c4f7f2313a540492b0e36166b3f09f8211f518c43eaf0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a malicious domain, disguised as a resume template. The heuristic firings indicate this is a malicious redirector and part of an SEO link farm, likely intended to phish users. The ML classifier strongly supports the malicious verdict.

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.com/pify?keyword=resume+cover+letter+email+template In PDF document text
    • http://files.susefarms.com/uploads/1/3/1/3/131380591/011b5fe7e1f7c.pdfIn PDF document text
    • http://files.norcaair.com/uploads/1/3/0/7/130738513/bodetepalutukir-fevefiwi-zaxodagexox.pdfIn PDF document text
    • http://femoxedun.reventnews.com/uploads/1/3/1/6/131606758/1bd1bc.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/1/0437/1503/5291/files/genie_pro_98.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9348/1889/files/botw_ice_keese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1162/1543/files/kudeziroxosiluxaluze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7053/7374/files/84485894792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8343/9011/files/78286633839.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4790/2622/files/wazalalidasozelemejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/40461260950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0640/6295/files/75856853714.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2602/8456/files/denuberadogumatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2768/4760/files/garuper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2150/8506/files/18269426575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1271/6701/files/42727365206.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 3

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_off000073f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73F4 5148 bytes
SHA-256: 8b6ccde57c87dd615b85a7fab9789e13bdb426696c1085bf6ab267bace1b42fb
font_01_sfnt_off00008566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8566 10276 bytes
SHA-256: bf0123bf16c3d9224b5f335aabf944f65a2a665df7c7e114e11c9984605c0684

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