Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bedfcaffff3b544…

MALICIOUS

PDF

42.1 KB Created: 2020-10-29 18:29:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76a99f9978c783db99c6e273398e843d SHA-1: 543fd438c01b76c27419e69996cadacc6ac3f385 SHA-256: 7bedfcaffff3b544774975b5dc34b777fa13a8352803ea03e1a58a3f4f7e4ee8
174 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a URL that matches this redirector. The presence of numerous embedded links and the ML classifier's high confidence score indicate a malicious intent, likely to direct users to a phishing or malware site.

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.
  • 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.com/123?keyword=los+angeles+county+death+certificate+order+form
    • https://cdn-cms.f-static.net/uploads/4383470/normal_5f8da5453fe6d.pdf
    • https://cdn-cms.f-static.net/uploads/4374177/normal_5f90f25cdc4bc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/86a14d70-0fc3-4f3e-bfdb-7e4b21c0aed2/mawowelasumebafi.pdf
    • https://cdn.shopify.com/s/files/1/0479/2670/6343/files/36636615503.pdf
    • https://uploads.strikinglycdn.com/files/7ad46eb7-9f1b-41d3-a427-55c01338d243/weller_self_serve_grand_rapids.pdf
    • https://cdn.shopify.com/s/files/1/0495/9505/6291/files/kirby_and_meta_knight_fanfiction.pdf
    • https://s3.amazonaws.com/henghuili-files/gopofowaximodu.pdf
    • https://uploads.strikinglycdn.com/files/afdd0594-d7e7-4fd5-9861-33044f46e5c4/79657368420.pdf
    • https://s3.amazonaws.com/zuxadol/zamudumubiritijudobun.pdf
    • https://uploads.strikinglycdn.com/files/5401ed48-dc80-4cf6-90ab-3f1b9aedf3cf/suzev.pdf
    • https://cdn.shopify.com/s/files/1/0506/7171/4491/files/bazafejofunape.pdf
    • https://cdn.shopify.com/s/files/1/0503/1329/8093/files/wheres_my_water_2_android_game_download.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006358.bin
56a9f9be3d8c5326521f875ee0c75fa822a4cf52485275e1189b5a2eed53046b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6358 5476 bytes
font_01_sfnt_off000075d9.bin
1f9ace6cd0d3588dc3ed9e6b9c5da5712feeb59baf0b8ae5440a50268684c165		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75D9 10936 bytes

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