Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a8a1558b1bfe752…

MALICIOUS

PDF

44.5 KB Created: 2020-08-24 09:30:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a4a192345a4ea28ea252ffc50c5956b SHA-1: 82a6bcc3a52e1d240cb2904418cfa7aeb7d98cd5 SHA-256: 2a8a1558b1bfe752f789dcbb3e8ba1366b09a60ec1adfbe9fb0cee7203b4327e
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links, with a primary malicious redirector identified at https://ttraff.ru/pify. This suggests an attempt to either boost SEO for malicious content or to redirect users to potentially harmful websites. The document body contains garbled text but includes the malicious URL, reinforcing the attack pattern.

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=awg+conversion+chart+pdf
    • http://files.port10logisticscenter.com/uploads/1/3/0/7/130739831/2884157.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/tawoju.pdf
    • https://cdn.shopify.com/s/files/1/0433/7080/7461/files/21187877509.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/area_of_similar_triangles_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/5959/2859/files/fuvemezazanakimomofaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/0448/3993/files/99530051535.pdf
    • https://cdn.shopify.com/s/files/1/0432/9255/7467/files/zewanobalimalibamat.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5502/files/98083427988.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8375/files/14443332804.pdf
    • https://cdn.shopify.com/s/files/1/0439/2275/1643/files/vetewuvinafumuvefugu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3501/7884/files/doxarisolodugofufezajusa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5113/0785/files/tratamento_da_pneumonia_bacteriana.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_off000064b2.bin
cad679ad7813d1aee5580d7b0a28157d5fb06c530a08be6fca5c313857b6288b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64B2 5524 bytes
font_01_sfnt_off0000778a.bin
e1601fa9b9c804830140154b3e82b1597c4cf607f8dcb28da33a9a6bfd74705f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x778A 14536 bytes

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