Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbee9b3bd0495ae2…

MALICIOUS

PDF

44.6 KB Created: 2020-08-22 02:08:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28ebafd49d62a3c7b02b8e4f1391a045 SHA-1: 779f9a53cbb5db6fe5b25190410184dfd22fa55e SHA-256: fbee9b3bd0495ae2c9429a13d2172c7e98d609b4f987c1f85c1f2d3ec24aa730
154 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, which is also present in the document body. The document also exhibits characteristics of a PDF link farm, with numerous embedded links pointing to external resources, many of which are hosted on Shopify. The primary malicious URL is https://ttraff.cc/pify?keyword=simple+llc+operating+agreement+template+free, which likely serves as a lure to download further malicious content. No scripts were extracted from this sample.

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.cc/pify?keyword=simple+llc+operating+agreement+template+free
    • http://files.semperparatuspelli.com/uploads/1/3/1/3/131380440/votilufavudanevu.pdf
    • http://belafijom.boneschool.net/uploads/1/3/1/4/131453109/6107725.pdf
    • http://buferela.thedreamteamsoccercamp.com/uploads/1/3/0/8/130814328/xomojofogalo.pdf
    • http://xukutusod.houstonhighschoolptso.com/uploads/1/3/0/7/130776485/0f99e828b.pdf
    • http://files.jehphotography.net/uploads/1/3/2/8/132814906/8024579.pdf
    • https://cdn.shopify.com/s/files/1/0435/9671/0050/files/36870466105.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0694/files/87679417141.pdf
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/bulletin_de_paie_vierge.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6580/files/73611608943.pdf
    • https://cdn.shopify.com/s/files/1/0441/0834/9592/files/87292280399.pdf
    • https://cdn.shopify.com/s/files/1/0434/1855/0439/files/database_administrator_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1592/files/63275586229.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/85327063879.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6513/files/coding_guidelines_for_diabetes_mellitus_type_1.pdf
    • https://cdn.shopify.com/s/files/1/0435/2894/5819/files/81807307709.pdf
    • https://cdn.shopify.com/s/files/1/0431/4962/3462/files/ap_sakshi_news_paper_today_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/rc_plane_design_dimensions.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_off0000701b.bin
2a8b0b5a3ec50c475a9b30a6a1a4f044bfe08aa5153b73eaae50ce184f6e8b50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x701B 5260 bytes
font_01_sfnt_off000081e3.bin
dd6e07a116e6e76ab6129e3b518bd6b0e128099fdb3c08201cfec98cd697e49d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81E3 10356 bytes

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