Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e983f744fe77da…

MALICIOUS

PDF

58.7 KB Created: 2020-08-21 16:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a752753a41f5f73deda7fc4e50046c0c SHA-1: 5198a358bc2a04ac23869ede19540d7fac86d4ac SHA-256: 99e983f744fe77da3cbea0e3658a37e214ccb643c1ed57d21dc82fb887d3e804
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also strongly flagged this PDF. The presence of numerous links suggests an attempt at SEO poisoning or a broad phishing campaign. No scripts were extracted, limiting the analysis of direct payload delivery.

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=biological+science+scott+freeman+pdf In PDF document text
    • http://files.maryviewgr3.com/uploads/1/3/2/6/132695694/7874151.pdfIn PDF document text
    • http://files.foodforthesoul.net/uploads/1/3/2/6/132682585/toxetijekikudem_rijiwipefaduf_vumetov_nakajejisenu.pdfIn PDF document text
    • http://files.blissfuleventplanners.com/uploads/1/3/1/3/131383892/totizeribex-tuzevu.pdfIn PDF document text
    • http://jefatu.openboxm.com/uploads/1/3/0/7/130776031/3323377.pdfIn PDF document text
    • http://files.theplaymakermanager.com/uploads/1/3/1/3/131383821/000d01819a6b9.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/1/0434/0436/1884/files/pupow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9616/9886/files/2008_vw_beetle_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4972/2790/files/29515763502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/automotive_industry_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1564/3031/files/81824089872.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2214/8003/files/budaletipureniziw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/0129/3461/files/kalnirnay_2020_marathi_calendar_download_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5308/8919/files/kidon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5331/7272/files/37814899027.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/42576635151.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_off0000a81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA81D 5524 bytes
SHA-256: b33a252516e018625713bcbe5c672173e0ae1dd55bf96cc7a93a9c6b334408d2
font_01_sfnt_off0000bac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAC9 10236 bytes
SHA-256: 5c7de2e7a943ef582fa54b7456fba1b46ae0c4a59e37f987dfaf1d3d125466bc

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