Malicious PDF — malware analysis report

Static analysis result for SHA-256 acf674ac116e019b…

MALICIOUS

PDF

44.6 KB Created: 2020-08-09 23:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1377a20653fdfd299d85df206b744463 SHA-1: 9e387c7654378e414685c2b85a78798dc18c1d22 SHA-256: acf674ac116e019be68e5d68ea468b6fa751d71acbfaec48cc8075198cdfbb06
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to trick users into clicking. The ML classifier also strongly indicated maliciousness. The presence of numerous Shopify links, while mostly benign, suggests a link farm used for SEO poisoning to increase visibility of the malicious content.

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=agile+scrum+tutorial+pdf
    • http://files.nowbiz.net/uploads/1/3/2/8/132814272/sabupilareredobete.pdf
    • http://files.christinestow.com/uploads/1/3/0/7/130775228/c94e79700428b21.pdf
    • http://files.vegan-versions.com/uploads/1/3/1/3/131379792/rozofofare-rewalujusubukim-laturadin-zidabu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7966/3765/files/28602788427.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/malipesuka.pdf
    • https://cdn.shopify.com/s/files/1/0432/6991/4782/files/sipekidajulilogasovefop.pdf
    • https://cdn.shopify.com/s/files/1/0433/6985/7176/files/dogogekar.pdf
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/bahama_bucks_application.pdf
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/67931397155.pdf
    • https://cdn.shopify.com/s/files/1/0428/4517/5971/files/68730945186.pdf
    • https://cdn.shopify.com/s/files/1/0434/7900/7384/files/advanced_excel_practice_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/55504058992.pdf
    • https://cdn.shopify.com/s/files/1/0440/0329/5382/files/png_interlaced_vs_none.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6353/files/porsche_owner_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/3164/9689/files/80171509875.pdf
    • https://cdn.shopify.com/s/files/1/0439/6895/4526/files/kindle_converting_to_mobi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/44918411259.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0497/files/konsep_bilangan_bulat.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/1/0428/4517/5971/files/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070b9.bin
bd6f6fe2764c8279729fefa40ab3872836ea0e80ff8dcb7f6ce6e9b38b8bff99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70B9 5464 bytes
font_01_sfnt_off00008343.bin
6453e11a341f6738285c6276ca59758916d14b236ed2b9fcd04532b84e78597d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8343 9864 bytes

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