Malicious PDF — malware analysis report

Static analysis result for SHA-256 864123e8112b732c…

MALICIOUS

PDF

38.1 KB Created: 2020-08-21 18:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7055419dfc68d7ddbb5807fe8e0a118e SHA-1: ceb32d55b359d9f96835ba63bba7438528650511 SHA-256: 864123e8112b732c63fa9f05d729fb8decfab8048515a6b39f5706cc3d835293
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a strong indicator of malicious intent. The document body, though heavily obfuscated, contains text related to 'game beamng drive apk for android', suggesting a lure for potentially unwanted software or malware. The presence of numerous external links, many pointing to Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to distribute payloads.

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.ru/pify?keyword=game+beamng+drive+apk+for+android
    • http://femudi.tenniswos.co.uk/uploads/1/3/1/6/131606739/8534197.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/6133/7494/files/velakimolurudebumojati.pdf
    • https://cdn.shopify.com/s/files/1/0450/4230/3140/files/bipartite_graph_in_graph_theory.pdf
    • https://cdn.shopify.com/s/files/1/0428/0067/7031/files/6529734462.pdf
    • https://cdn.shopify.com/s/files/1/0439/7491/8302/files/fiwebuxugejirabifokeka.pdf
    • https://cdn.shopify.com/s/files/1/0430/8867/4967/files/4368278419.pdf
    • https://cdn.shopify.com/s/files/1/0432/7689/4372/files/wagaxafuxopa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9650/6521/files/71712450978.pdf
    • https://cdn.shopify.com/s/files/1/0431/0505/8976/files/83013811698.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/20413823876.pdf
    • https://cdn.shopify.com/s/files/1/0432/8652/8164/files/calculus_for_life_sciences_bittinger.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/37554355969.pdf
    • https://cdn.shopify.com/s/files/1/0434/4211/0631/files/addition_problem_solving_worksheets_for_grade_1.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_off00004652.bin
81fbf20c7827383e575221228f3c3b7bedfcaf13a1455d80654a03d8efde90e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4652 5152 bytes
font_01_sfnt_off000057c3.bin
c397e9d4577f1d2d5c49655cb457b486650dbde592f045ec51e0e261a94c4f06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C3 10700 bytes
font_02_sfnt_off00007bce.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BCE 4324 bytes

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