Malicious PDF — malware analysis report

Static analysis result for SHA-256 28ae460373d18a1f…

MALICIOUS

PDF

42.2 KB Created: 2020-08-17 16:30:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3a0933a67b00b586a80cd7df23b16f15 SHA-1: 3236c9eb9566e8b70af9a765a3e4027dc6ca6f0c SHA-256: 28ae460373d18a1f7237b584bf32c5f9e315333b9a728a33193a6768085194ca
214 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the ttraff.com domain. The document body and heuristics suggest a lure related to a 'utility bill', aiming to trick the user into clicking the malicious link. The presence of a large number of external PDF links further indicates a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=sample+utility+bill+pdf+uk In PDF document text
    • http://files.ce-naturalhealth.com/uploads/1/3/1/8/131856645/merazufenazafadi.pdfIn PDF document text
    • http://nidelowe.cbtbowling.com/uploads/1/3/1/4/131453990/5bad533aa6daf8a.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/1/0427/5548/9948/files/94810290344.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0564/8801/files/jomagikurofiviwovopas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1928/6174/files/autodesk_bim_360_docs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1340/5850/files/68102902183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3237/0590/files/16304448375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2644/7525/files/61281489086.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/66486756629.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0379/5865/files/76851682578.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59B2 4988 bytes
SHA-256: 00a72c07ffb7bb63d738fd2406f27c09e8f4b47449f710c37dbe25f32c0b7f6e
font_01_sfnt_off00006ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB8 10936 bytes
SHA-256: f901ea1d02858e0b182b916a30f29d7a9115d4eecde5578fb0e66452452302cd
font_02_sfnt_off00008e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E89 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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