Malicious PDF — malware analysis report

Static analysis result for SHA-256 652a5143d3ec16b7…

MALICIOUS

PDF

101.3 KB Created: 2020-08-03 05:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3411a61cd9b120b3756530330e4de23c SHA-1: cadec7da56437154bbf0b7ce56c6c42ce5d27eb1 SHA-256: 652a5143d3ec16b7dfdfded126a9c17815c30ece7182bbd9bd48b989b7613963
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=watchmen+parents+guide', suggesting a phishing or scam attempt. The presence of embedded links and the ML classifier's high confidence indicate malicious intent.

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=watchmen+parents+guide
    • http://files.dstmilledgevillealumnae.org/uploads/1/3/1/4/131453993/sopenafeji.pdf
    • http://files.hi-techmarketing.com/uploads/1/3/1/4/131406403/e6949.pdf
    • http://files.autumnhype.com/uploads/1/3/1/4/131453384/sifigibit-nateximal-zesere.pdf
    • http://files.lynnkirkham.net/uploads/1/3/2/6/132695651/bcaa862.pdf
    • http://files.engagebetween.com/uploads/1/3/1/6/131606115/1600933.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/80020364852.pdf
    • https://cdn.shopify.com/s/files/1/0434/6186/9733/files/debaxarufajamekamedibixo.pdf
    • https://cdn.shopify.com/s/files/1/0436/3019/8937/files/23483507070.pdf
    • https://cdn.shopify.com/s/files/1/0433/3151/8622/files/11974607123.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2622/files/3248129502.pdf
    • https://cdn.shopify.com/s/files/1/0433/6277/9295/files/zaxubuxiwusipetowijow.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1632/files/magedu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/sapupimujejosis.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/luwut.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/fuzovobit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45927795399.pdf
    • https://cdn.shopify.com/s/files/1/0431/1308/7142/files/mekinaga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57896919986.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00015757.bin
754f9f618130c6cc2add92badda082a5b2dd2453c8f6d30309dbc4c8ad118b90		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15757 15688 bytes
font_00_sfnt_off000144e2.bin
590a9358668cbe23ed2d989074671842fbd2d03be2765de8fd424155918ceadb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x144E2 5468 bytes

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