Malicious PDF — malware analysis report

Static analysis result for SHA-256 8949c7804d31e65f…

MALICIOUS

PDF

51.8 KB Created: 2020-08-06 13:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c23cb5f58d3346261849cc03f251e582 SHA-1: 4f22bf8d8fb47337a4f5453787f446ef371b2456 SHA-256: 8949c7804d31e65ff3c3c20c7e58bb825339129accce5dfc80801734702acfde
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to create a link farm, with a primary redirector pointing to a malicious URL. The document body, though heavily obfuscated, contains the redirector URL and several benign-looking Shopify links, suggesting a phishing or scam attempt. The ML classifier strongly indicates 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=formulas+in+excel+sheet+pdf In PDF document text
    • http://files.goldenbeemx.com/uploads/1/3/2/8/132814415/tukamejamotuvolaju.pdfIn PDF document text
    • http://files.nclbl.org/uploads/1/3/0/8/130874007/napevo.pdfIn PDF document text
    • http://files.ricepaperdesigns.com/uploads/1/3/1/0/131070751/626a1.pdfIn PDF document text
    • http://pofigorut.eliteheatbuffalo.com/uploads/1/3/2/6/132681579/1859894.pdfIn PDF document text
    • http://files.myfairladyministry.com/uploads/1/3/0/9/130969577/bebapi-pemufosagove-mizozar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2675/0357/files/gadepasuwoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1884/4322/files/fanotepiluwete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8610/9086/files/acute_abdomen_articles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4411/8423/files/50723545393.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1540/3682/files/moparasapufujufowur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8006/4936/files/6611740547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8948/5221/files/66231780247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6508/8917/files/7619584339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0081/2952/files/passive_voice_continuous_tense_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4555/2277/files/aprender_ingles_rpido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0775/2866/files/zojadanotazulimul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3849/9235/files/tozobororoxeninanapabud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9120/5021/files/67090919442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9332/7008/files/momebo.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000731c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x731C 5300 bytes
SHA-256: a498eb71531894972e374c8723bde206ddd0a32b9a0b8869935567444384f338
font_01_sfnt_off000084f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F8 15136 bytes
SHA-256: 6294ba55005f83a66cfd9dba6621f16fba70fcb25f4645e9f3fe09d479ec23b5
font_02_sfnt_off0000b401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB401 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3