Malicious PDF — malware analysis report

Static analysis result for SHA-256 091dd1c70baab1a9…

MALICIOUS

PDF

94.4 KB Created: 2020-08-12 15:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c9e53dc3885e2cb00c74552b212e2962 SHA-1: a1ffb00ba27e838047576ab8599ded97a98c4e11 SHA-256: 091dd1c70baab1a9a445ca8d5f50be06eda2d6168de062625ae42a425f220a4a
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, identified as a redirector for SEO-based phishing. The document body, though heavily obfuscated, contains text that appears to be a lure for "anticoagulation guidelines chest pdf". The presence of numerous external PDF links suggests an attempt to create a link farm or distribute malicious 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.com/pify?keyword=anticoagulation+guidelines+chest+pdf In PDF document text
    • http://files.elevenbillionpeople.com/uploads/1/3/0/7/130739225/8d205e7c4e535d.pdfIn PDF document text
    • http://files.lauraavnaim.com/uploads/1/3/0/9/130969819/0ec2ee5.pdfIn PDF document text
    • http://misun.thoughtprovokingmomentsblog.com/uploads/1/3/0/7/130776483/7276805.pdfIn PDF document text
    • http://lajejik.carywoodcarving.com/uploads/1/3/1/3/131398591/xavejedebilufo.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/1/0431/3330/4993/files/rujanurisilumipan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0441/2583/files/55334022053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3103/5032/files/68165787548.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9932/3558/files/devejufuzivas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/kigadanebojupol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7673/1558/files/bestiariusz_starego_wiata_chomikuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52299098946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/81670325829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0515/5240/files/6519506692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/fokaxutubenese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9833/3599/files/bissell_proheat_2x_pet_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/7377/7319/files/epidemiologia_libros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5955/9065/files/zitipifujo.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_off00013235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13235 5308 bytes
SHA-256: aff68cab4f5aed2980421f4b3dae0414ea83a55a73e9f42492e5e517b5c5a3e2
font_01_sfnt_off0001443f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1443F 12432 bytes
SHA-256: c3c306bff705e68cd0d64e80ca8a0db668560b495505331c63a023361ea3a380

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