Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c92a104d5bb6d63…

MALICIOUS

PDF

59.4 KB Created: 2020-11-01 21:29:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b70d938480de8601228f1f859f6a4b3 SHA-1: 706d1949b6574fec589c82e95259f72ecde36e40 SHA-256: 6c92a104d5bb6d63f4d48afab4449452ac076eea66b2882cbf1decfb86c6b2e6
174 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to SEO-optimized PDF documents, a technique often used to inflate search engine rankings and direct traffic to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.club'. The document body, though heavily obfuscated, also contains the URL 'https://ttraff.club/123?keyword=abortion+clinics+near+memphis+tn', suggesting a lure to a malicious site disguised as search results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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) 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.club/123?keyword=abortion+clinics+near+memphis+tn
    • https://powedumino.weebly.com/uploads/1/3/4/3/134350182/07102.pdf
    • https://cdn-cms.f-static.net/uploads/4386073/normal_5f8cff625d9a1.pdf
    • https://cdn-cms.f-static.net/uploads/4387718/normal_5f9096d6baedd.pdf
    • https://cdn-cms.f-static.net/uploads/4390385/normal_5f9437f8df061.pdf
    • https://cdn-cms.f-static.net/uploads/4426267/normal_5f9af03f35703.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0501/5784/6703/files/1970_baldwin_motion_chevelle.pdf
    • https://uploads.strikinglycdn.com/files/abe3ff04-cc70-4fc1-bd26-7a71020ea515/tuliparasifitiwi.pdf
    • https://cdn.shopify.com/s/files/1/0500/2356/3434/files/vutegemukusumadewaba.pdf
    • https://cdn.shopify.com/s/files/1/0437/0743/3125/files/14064098574.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000099f2.bin
29640dddc05a0bb501edf889b6630606dc8ca33e01e7357d6ee7f6bf1a3c76fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99F2 5088 bytes
font_01_sfnt_off0000aaf8.bin
72a3e0993fb6d0ed5370fc8c18fc4b4ed70d3c41a0c4abc4e47a49631f4b4872		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAF8 11660 bytes
font_02_sfnt_off0000d292.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD292 4324 bytes

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