Malicious PDF — malware analysis report

Static analysis result for SHA-256 636417f53ff05169…

MALICIOUS

PDF

44.6 KB Created: 2020-08-18 19:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bb6fbd859396f9196a2ca9b7d5e21f9 SHA-1: 02b00b5387175ae62b7056902982e7743152023a SHA-256: 636417f53ff051698611f9fd6db0c76c8bedc515c7c6ab6b5dc1e51942a8ab83
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate software drivers, specifically 'samsung adb drivers free'. The primary malicious URL, 'https://ttraff.cc/pify?keyword=samsung+adb+drivers+free', is identified as a redirector to malicious infrastructure. The document's structure and embedded links suggest a phishing or scam attempt to trick users into downloading potentially harmful files.

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.cc/pify?keyword=samsung+adb+drivers+free
    • http://files.pencilartistbobbygoldsmith.com/uploads/1/3/1/4/131453276/bomoj.pdf
    • http://dogenan.dewintondesigns.com/uploads/1/3/0/8/130814328/bccaf.pdf
    • http://files.justagirlbjj.com/uploads/1/3/0/9/130969663/fefunaziwuz-zidoripuro.pdf
    • http://files.thebinarylivingway.com/uploads/1/3/0/7/130775653/fifedexezubo.pdf
    • http://vexora.beinmaroc.net/uploads/1/3/1/6/131637016/lezadovug-xanepazo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0439/0594/1672/files/nezusepava.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4054/files/muxolakesuzemera.pdf
    • https://cdn.shopify.com/s/files/1/0432/6142/7876/files/77971132340.pdf
    • https://cdn.shopify.com/s/files/1/0431/6076/4576/files/42974727104.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7581/files/27389906325.pdf
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/61999762168.pdf
    • https://cdn.shopify.com/s/files/1/0439/2108/0475/files/chandrayaan_2_information_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2425/2055/files/attestation_de_salaires_dclars_cnss_tunisie.pdf
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/99543340065.pdf
    • https://cdn.shopify.com/s/files/1/0435/6128/7839/files/functional_strategy_and_strategic_choice.pdf
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/7291043159.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_off0000644b.bin
dfa66b076091d173821da465f24ee15fcd2d9f9b6a1e5bfe28c3de8f31969d31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x644B 5192 bytes
font_01_sfnt_off000075c7.bin
32473cce58ea1001e76e440aa860f94f282d744337cf92523d2e0e7fc042bc92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C7 9792 bytes
font_02_sfnt_off0000975c.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x975C 4324 bytes

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