Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa20947b39e55eb3…

MALICIOUS

PDF

71.3 KB Created: 2020-08-10 16:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98bf70a611f333dabb377ec3048155e0 SHA-1: 3ab9287f2267cdbef4973f969261e45bcb756659 SHA-256: fa20947b39e55eb39617e14dd179b164a42ebd2370e4a60dbca76214efabb91e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. Additionally, PDF_SEO_LINK_FARM suggests a large number of external links, with the primary one being a redirector. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=characteristics+of+liberation+theology+pdf, which is the primary indicator of malicious intent.

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=characteristics+of+liberation+theology+pdf
    • http://dotemax.helenissocial.ca/uploads/1/3/1/8/131856772/313a5.pdf
    • http://files.mwdcoach.com/uploads/1/3/2/6/132682076/mefewufat_gorafupepe_pogez.pdf
    • http://files.honeybscollection.com/uploads/1/3/2/7/132710654/3372631.pdf
    • http://files.keepeducationpublic.org/uploads/1/3/1/4/131483955/93ef8.pdf
    • https://cdn.shopify.com/s/files/1/0433/6215/6702/files/couper_un_en_2.pdf
    • https://cdn.shopify.com/s/files/1/0435/5312/8612/files/18009888987.pdf
    • https://cdn.shopify.com/s/files/1/0434/4276/5991/files/wabuxojonovopuvin.pdf
    • https://cdn.shopify.com/s/files/1/0429/0455/1590/files/35011480768.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/tubunisezagupijola.pdf
    • https://cdn.shopify.com/s/files/1/0427/6148/6503/files/centre_pivot_irrigation_systems.pdf
    • https://cdn.shopify.com/s/files/1/0432/0182/2875/files/xixafoxobusowudi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0026/5878/files/l_encyclopdie_du_chocolat_valrhona.pdf
    • https://cdn.shopify.com/s/files/1/0439/4926/0968/files/data_sheet_template.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_off0000da6f.bin
b2208358243b1867569f8b9b8ed61ba667df33a4e4a973e3d47c3ac3cd9e3ea1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6F 5564 bytes
font_01_sfnt_off0000ed4c.bin
1519370f04314b866deddc8cd30041a55652eefcf3fdd72e043ae93ef2bae59c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED4C 10176 bytes

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