Malicious PDF — malware analysis report

Static analysis result for SHA-256 a13e67386ad28ff8…

MALICIOUS

PDF

74.5 KB Created: 2020-08-21 09:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02056ef7e0dfbce82051ff944248026a SHA-1: 639040e84a7724f283f55d821b574509fc212d5d SHA-256: a13e67386ad28ff8dfcdd9048ae045ba440a6f013153bcdd8a4014649b12196d
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the text 'After action report army' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=after+action+report+army
    • http://files.kaimarafghans.com/uploads/1/3/1/3/131380299/8645448.pdf
    • https://cdn.shopify.com/s/files/1/0432/3996/4834/files/cfr_title_21_part_110.pdf
    • https://cdn.shopify.com/s/files/1/0434/3762/1404/files/84064989678.pdf
    • https://cdn.shopify.com/s/files/1/0435/0876/0735/files/swot_analysis_of_nestle_company.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/jizafififukunamulowi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2711/1841/files/ruvuno.pdf
    • https://cdn.shopify.com/s/files/1/0437/1028/3931/files/jumejavaba.pdf
    • https://cdn.shopify.com/s/files/1/0449/9157/8276/files/articles_worksheets_for_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/kubufovad.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/python_gaussian_elimination.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_off0000e867.bin
6c0984c76939e2d9c3bfa4c56134663c4c820073db8080b85b5efaa6a8dd42df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE867 5040 bytes
font_01_sfnt_off0000f97f.bin
abb1b6a43d1bf34c61f74deec52dec9dc979ba440b55897ea9cee3729b8048ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF97F 10636 bytes

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