Malicious PDF — malware analysis report

Static analysis result for SHA-256 df73e65c2ac22ab6…

MALICIOUS

PDF

42.7 KB Created: 2020-08-08 17:39:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1785da3da09b5687a5cda9ca2ddba69d SHA-1: b024383221dd0a208fa0705f8a073e77522fdf9e SHA-256: df73e65c2ac22ab6857ac0db79e1a575edeef0c99e10885d8fc5fd00251eba2c
194 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically `https://ttraff.com/pify?keyword=html+tags+examples+pdf`. Additionally, it contains a large farm of external PDF links, many hosted on Shopify domains, suggesting an attempt to manipulate search engine results or distribute content through a large number of URLs. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector link is a high-confidence indicator of malicious intent.

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=html+tags+examples+pdf In PDF document text
    • http://gejuduwug.michelleconsidine.com/uploads/1/3/1/6/131606186/jefubusofise.pdfIn PDF document text
    • http://files.vasileiosbourmpounis.com/uploads/1/3/0/9/130969399/vugunesumod.pdfIn PDF document text
    • http://nedonem.jamesfamilypage.com/uploads/1/3/1/4/131453133/f3710d2.pdfIn PDF document text
    • http://files.paigeandmichaelb.com/uploads/1/3/1/4/131437005/6289540.pdfIn PDF document text
    • http://files.kathleenbrownpsychicmedium.com/uploads/1/3/0/7/130775950/dinetepoxo.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/1/0433/7834/4085/files/38793975592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9039/3755/files/can_i_really_trust_the_bible_barry_cooper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1984/5277/files/diablo_2_bowazon_build.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0691/7799/files/tupaxejoxelifixotidupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0427/8422/files/puropo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3284/5207/files/72487738334.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/jadiwiweseviwuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9262/1979/files/analise_de_dados_quantitativos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6192/6293/files/suburban_rv_furnace_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2155/7150/files/79609535082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3837/5074/files/plant_pathology_laboratory_equipments_and_their_uses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0857/3085/files/5248798566.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63EC 5292 bytes
SHA-256: 21bd5d2b38737b9cfd93eda8f24d86992134b56d56afd762b74d20a314f0eb3d
font_01_sfnt_off000075e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E7 12416 bytes
SHA-256: 967f5ce6fc192684b967b4bc9f0ec304443698356695597b0f9376a511ac89d7