Malicious PDF — malware analysis report

Static analysis result for SHA-256 23b0820c1a6219e1…

MALICIOUS

PDF

49.6 KB Created: 2020-08-18 19:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c072a1d6421195e08a7ec0afb8394f1a SHA-1: 2f3e3b3dce79f8db7e05f9df67f63d6cbf028d9c SHA-256: 23b0820c1a6219e107f1d8ae20d43c02ed23f656fb8af184cd6c042b067561c2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, suggesting a link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=acc+cholesterol+guidelines+2017, which is likely used to obscure the final destination of the attack. No scripts were extracted, but the structure and heuristics strongly indicate a phishing or redirection attempt.

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=acc+cholesterol+guidelines+2017 In PDF document text
    • http://files.celebratetogetherevents.com/uploads/1/3/0/8/130814666/c845401a1e9.pdfIn PDF document text
    • http://files.keysofawakening.com/uploads/1/3/1/4/131437236/667910821bf1.pdfIn PDF document text
    • http://fevese.pilloohs.com/uploads/1/3/0/8/130814297/b46d0908d3c94.pdfIn PDF document text
    • http://files.ohboreumoh.com/uploads/1/3/1/4/131454098/nepuxoden-xinetemilakapef-retapitu.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/1/0431/7904/9121/files/14895667636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4926/8886/files/putamerosebojukapafarabaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5824/2470/files/vonatir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5014/7745/files/83499951592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0677/0843/files/problem_starting_logilda._dll.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1729/0407/files/toribash_face_textures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7287/9773/files/femiwilotarajapew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/les_liants_et_les_adjuvants.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7709/8915/files/agency_theory_adalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4383/1464/files/78264190739.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4112/6565/files/26064276372.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4354/4488/files/gadatuziguzalajajimeju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8956/6627/files/boxobuzipajota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4002/8325/files/6184338989.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 6

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_off000077ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77AB 5384 bytes
SHA-256: a1af87cc6dcbb1e2bbfb6d5628b9394c63f960dc3a0b3d68664854f01a7fd97a
font_01_sfnt_off000089fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89FE 14872 bytes
SHA-256: 6df387d4c84736a2f75795e02bf49dabfaf2744158963207cd1538d2bc5b9cbb

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