Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f93762acc6cf56a…

MALICIOUS

PDF

42.4 KB Created: 2020-08-22 01:38:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99ab0890f166d73717e196298e496072 SHA-1: a85d345877fe332678689b0438787ad5bc1fdf1b SHA-256: 2f93762acc6cf56a4cc1220b7edbd15661eb5bff8a3c96617c7eab1655615904
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a technique often used to obscure malicious intent or to distribute further payloads. The heuristic PDF_SEO_LINK_FARM indicates a link farm, and PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to known malicious infrastructure. The ML_NYX_PDF_MALICIOUS score further supports the malicious classification. The document body contains the URL https://ttraff.ru/pify?keyword=shibboleth+sp+iis, which is flagged as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=shibboleth+sp+iis
    • http://files.bnkrescue.com/uploads/1/3/1/3/131384604/feganofivet-jigivojaxopu.pdf
    • http://ginawus.carrollwallace.com/uploads/1/3/1/8/131856177/046e3c0463.pdf
    • http://kowog.gordonjames.net/uploads/1/3/1/4/131407815/dab90d779f7606e.pdf
    • http://kavekule.academicsuccessblog.com/uploads/1/3/1/4/131437689/wawexelum-karew-pegozesapu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8688/8601/files/teardrop_banner_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1765/files/fagafegupovimuz.pdf
    • https://cdn.shopify.com/s/files/1/0454/2342/7752/files/english_to_tamil_conversation_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/1447/0302/files/7955321037.pdf
    • https://cdn.shopify.com/s/files/1/0433/6815/3239/files/asterix_comics_free_deutsch.pdf
    • https://cdn.shopify.com/s/files/1/0432/8521/7436/files/network_layers_explained.pdf
    • https://cdn.shopify.com/s/files/1/0447/5063/5162/files/dennis_rainey_preparing_for_marriage.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/brevi_racconti_in_inglese.pdf
    • https://cdn.shopify.com/s/files/1/0435/6194/3199/files/introduction_to_structured_cabling_system.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000642e.bin
3cb7aa9d058c6925b9a53627157ca91f6d85a3ee51db45af2c65588bb8f64229		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642E 4844 bytes
font_01_sfnt_off00007497.bin
d0b3e935b6706ab969e7b8265472f043c83c15f645cb5921e8ff76d4d5b21211		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7497 12488 bytes

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