Malicious PDF — malware analysis report

Static analysis result for SHA-256 0379081ba20bdb94…

MALICIOUS

PDF

43.5 KB Created: 2020-08-23 04:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d01516cedc479f99b4a3bfde6e9fd6b SHA-1: 74478735068c238b53b5b92ce2071647a2f22581 SHA-256: 0379081ba20bdb94da996a726cfad5dc83a353771f95b523dd01793d2df0f7b7
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=baidu+spark+browser+for+android+free'. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or redirection attack.

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/pify?keyword=baidu+spark+browser+for+android+free
    • http://files.greenagenda.co.nz/uploads/1/3/0/9/130969957/berodibesizub.pdf
    • http://files.artoasis15.org/uploads/1/3/1/6/131606951/f7f74a07.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/18113025230.pdf
    • https://cdn.shopify.com/s/files/1/0438/6009/9222/files/education_coordinator_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/8251/4581/files/todas_as_aberturas_de_xadrez.pdf
    • https://cdn.shopify.com/s/files/1/0437/3620/3415/files/business_success_tips.pdf
    • https://cdn.shopify.com/s/files/1/0454/8123/0488/files/spatial_statistics_thesis.pdf
    • https://cdn.shopify.com/s/files/1/0438/1881/1552/files/muloxewunitatobakenili.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3468/files/24539224503.pdf
    • https://cdn.shopify.com/s/files/1/0432/7292/9435/files/21760097583.pdf
    • https://cdn.shopify.com/s/files/1/0429/9623/6447/files/baseb.pdf
    • https://cdn.shopify.com/s/files/1/0430/9545/7941/files/davudalelimolomutitajevan.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_off00005ea1.bin
40813d0223f5ddb79f64c0592c9998e22540612e4b06d1ed9c90b627a387140a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA1 5148 bytes
font_01_sfnt_off00007033.bin
2856afabfc12d4306e67af9b0c69c214a2c7dc90c189e0e34fa2609dcd6910dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7033 10132 bytes
font_02_sfnt_off000092c5.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92C5 4324 bytes

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