Malicious PDF — malware analysis report

Static analysis result for SHA-256 393c0eed9f4acbcc…

MALICIOUS

PDF

46.8 KB Created: 2020-08-09 15:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 366d13069eef1dd25fe40604966ea397 SHA-1: 9adc55433fa2ad37a834f851e2f50d73c602fea7 SHA-256: 393c0eed9f4acbcc43925a9da5a12915eb51472be67cb2cc99a7a2f6e26524f2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged as malicious due to a critical heuristic identifying a link to a known malicious redirector. The document body contains obfuscated text and embedded URLs, including the primary malicious redirector. The presence of multiple embedded links, many pointing to Shopify, suggests an attempt to disguise the malicious intent within a large number of seemingly benign links, a common tactic in SEO spam or phishing campaigns.

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=absolute+beginner+s+guide+to+digital+photography+pdf
    • http://files.comforttrainer.net/uploads/1/3/0/7/130776277/tutuwu.pdf
    • http://files.wbdesign.info/uploads/1/3/0/8/130814110/6367889.pdf
    • http://files.leandraurrutia.com/uploads/1/3/2/3/132302993/donatu.pdf
    • http://files.pleis.us/uploads/1/3/0/7/130738822/jakatijabeje.pdf
    • http://files.merrittbiology.com/uploads/1/3/1/4/131406861/vitilejixulek_gurutimizez_sabosemoxudu_pirafawe.pdf
    • https://cdn.shopify.com/s/files/1/0428/8551/3379/files/69008204997.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1674/files/linokokijodekulimir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9937/4233/files/mibelidinepexeteza.pdf
    • https://cdn.shopify.com/s/files/1/0431/6630/2359/files/engineering_drawing_book_for_alp.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0353/files/rafamidogo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/zabafawugido.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/dofasidepelif.pdf
    • https://cdn.shopify.com/s/files/1/0435/2668/4824/files/rosam.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8083/files/thermal_physics_schroeder_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0439/1705/0008/files/tivibi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5351/files/shiva_manasula_shakti.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nudukesobiji.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/
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/zabafawugido.p

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007743.bin
1ca1dbeb11f4fc99f82fcdf322a2089fdf16e9bdf7177139e9ae278fe4f60ff7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7743 5532 bytes
font_01_sfnt_off00008a0f.bin
dd80d21fb2c22fc5f2ff5ef7b1b8e10528ab2f69d8b04416a892e1b2f57ad957		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A0F 10296 bytes

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