Malicious PDF — malware analysis report

Static analysis result for SHA-256 309451a3ec72dfc9…

MALICIOUS

PDF

39.7 KB Created: 2020-08-19 20:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 24dc16342d64952e022d5c2201b88447 SHA-1: 2145c7576013f23790a262f67d88d59b6291bf4d SHA-256: 309451a3ec72dfc9b44bacfe20f37dbba5b9e93bd5a408261b0b47e2d9046f50
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as an offer for 'cheapest insulated roofing sheets'. This, combined with the heuristic indicating a callback phishing or tech-support scam lure, suggests the document's primary purpose is to trick the user into clicking the link. The document body itself is heavily obfuscated but contains the malicious URL. No scripts were extracted from this sample.

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=cheapest+insulated+roofing+sheets In PDF document text
    • http://medixad.artsxtra.com/uploads/1/3/2/7/132712323/8032583.pdfIn PDF document text
    • http://files.theyellowtree.ca/uploads/1/3/2/6/132696171/5539194.pdfIn PDF document text
    • http://files.captainmorganssailcharters.com/uploads/1/3/1/3/131381607/b178bb.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/1/0433/9892/2403/files/rakape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5575/7977/files/97271944500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/91428743782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4259/3189/files/javixajomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5452/1758/files/tutezok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6616/9246/files/97217272163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/xilalawasum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0672/2211/files/75522048300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/64474740726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/bedroom_design_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0114/3715/files/6206326469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/nozilik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9635/7530/files/rizoxofibipomosadoronof.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_off00005e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E08 5208 bytes
SHA-256: 7a0bd8d436b73855228a71e9dd97e2b43b14f216da2ea3c27230d5d3015c42b7
font_01_sfnt_off00006fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB0 10048 bytes
SHA-256: 0164efc8e3974cd854cb211bda08ece74bef76097f0d25dbd53cfb25f11d45a0