Malicious PDF — malware analysis report

Static analysis result for SHA-256 0295d001246b1304…

MALICIOUS

PDF

40.3 KB Created: 2020-08-31 01:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38d4f6f4c885f76905d54b790560006f SHA-1: 6d73f8406a8ebedf83011562086ec6d54dcdd6c4 SHA-256: 0295d001246b130494f105899678a4c8d280eec100d1555e8563208f7729fe4d
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.com, which is disguised as a mobile home repair manual. This indicates a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous embedded links, many pointing to benign Shopify URLs, suggests a link farm designed to obscure the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/wix?keyword=mobile+home+repair+manual+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/55745938923.pdf
    • https://cdn.shopify.com/s/files/1/0436/1050/5379/files/japan_guide_kansai_thru_pass.pdf
    • https://cdn.shopify.com/s/files/1/0432/1512/6692/files/85536763008.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5400/files/bexatilamu.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc25a47a265146d5aba92136afab4e3e.pdf
    • https://static.usrfiles.com/ugd/b8c837_449531be947f4abbbab4ac6ba5463b66.pdf
    • https://static.usrfiles.com/ugd/111c46_dd38baabb02a45d4871b14d54f7b6d0e.pdf
    • https://static.usrfiles.com/ugd/b65acf_2ac8c4becdea4f208d3e4c11f7ac2114.pdf
    • https://cdn.shopify.com/s/files/1/0439/0112/4760/files/75567733975.pdf
    • https://cdn.shopify.com/s/files/1/0434/0944/0933/files/different_types_of_phobias_psychology.pdf
    • https://cdn.shopify.com/s/files/1/0445/2355/2927/files/134_flight_attendant_interview_questions_and_answers.pdf
    • https://static.usrfiles.com/ugd/67e251_18e914aab87440588c178d90dc4c824c.pdf
    • https://static.usrfiles.com/ugd/33ab24_876b05941077417587a19efb6898cafe.pdf
    • https://static.usrfiles.com/ugd/8b49c6_f45aae2d3e4140e884e639551bef229f.pdf
    • https://static.usrfiles.com/ugd/8cbfce_b41cca1fb1a44e6689f9c8abc79c9579.pdf
    • https://static.usrfiles.com/ugd/493135_c244a20c819747c7bbf873e36524a6fe.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_off0000533d.bin
cb0907ce715105acacb17211ddb8cd208a26076d53f2a4b08c391b619d9f7c0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x533D 5048 bytes
font_01_sfnt_off00006428.bin
b94a3812143ce61e29411adf3a6341d3ba6d2199242d17618d9ba2cf0c63c1cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6428 9928 bytes
font_02_sfnt_off0000862a.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x862A 4324 bytes

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