Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fd901a000958e85…

MALICIOUS

PDF

42.8 KB Created: 2020-08-27 16:31:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 627cb65a570ce41631257d2e29ec2cda SHA-1: e8fc6eab3c8891a42418f59fdffca3ad8f148cf1 SHA-256: 8fd901a000958e8521763f884209b5b9fdbf3a1448ebdfe476bfa1ef6e6117b4
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=procesos+e+hilos'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary one being 'https://cdn.shopify.com/s/files/1/0430/6799/8359/files/tosigasuwevefubevusesamof.pdf'. The document body, though heavily obfuscated, contains these URLs, suggesting the file's purpose is to direct users to potentially harmful external content.

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/pify?keyword=procesos+e+hilos In PDF document text
    • http://files.bearlakedental.com/uploads/1/3/2/6/132681342/5864819.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/1/0430/6799/8359/files/tosigasuwevefubevusesamof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5180/3039/files/38611329918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/cheat_engine_6._1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8941/2767/files/pufubaxoludiwisagubifijad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0360/8231/files/94999255921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9403/9975/files/sijipuwukufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9821/9420/files/91426917445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/pezajumukupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5283/4717/files/warhammer_40k_8th_edition_datasheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2743/9526/files/wimaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4434/7799/files/betora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0620/5857/files/nitro_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/gobunos.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 1

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_off0000689b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x689B 4676 bytes
SHA-256: 805470ca9151dafad74b14531014618caba0b14fffafa8044710b642dad81691
font_01_sfnt_off00007870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7870 11416 bytes
SHA-256: c5d121361fc9e4bb43f9b39fcc40b6e8b5f8a396d1b0bb55d7c01472fba96e90

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