Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8e7293ce5bb26f7…

MALICIOUS

PDF

48.2 KB Created: 2020-08-14 00:41:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c93f5a553c35ac3703e47d8f4bae07a SHA-1: 3b4b52b49f01ff58cfc897621c99bedc9c2cfa1f SHA-256: b8e7293ce5bb26f7ade6897d389579490a9511e69f9a44e9c89f78eef7a8549b
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic identifying it as a link farm. One of the primary links directs to a known malicious redirector service, 'ttraff.ru', which is likely used to obscure the ultimate malicious destination. The document body itself is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

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=user+persona+template+sketch
    • http://files.cwc-jackson.org/uploads/1/3/1/4/131482962/jerodibopavakiwu.pdf
    • http://timexuli.chennaishiayouth.com/uploads/1/3/1/0/131070805/nuzarapij.pdf
    • http://files.ntoumei.com/uploads/1/3/0/7/130776120/1e1d7c804d.pdf
    • https://cdn.shopify.com/s/files/1/0438/2064/6562/files/adolix_split_and_merge_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0433/4652/6361/files/soluloku.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/84259252058.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/16833112134.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9815/files/vasuzav.pdf
    • https://cdn.shopify.com/s/files/1/0436/4101/2374/files/jarvis_health_assessment.pdf
    • https://cdn.shopify.com/s/files/1/0440/2121/9493/files/conjunctions_worksheets_for_grade_2.pdf
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/shoulder_dystocia_management.pdf
    • https://cdn.shopify.com/s/files/1/0432/0234/7168/files/rosusirelomitefova.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51191810805.pdf
    • https://cdn.shopify.com/s/files/1/0431/4526/5318/files/8098273316.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6677/files/wizugare.pdf
    • https://cdn.shopify.com/s/files/1/0432/6047/7595/files/tifodu.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_off00007fce.bin
0527bc2f782b8ba6039f5178e291f8f1d08c377bc50a62c30c984020a2ec296e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FCE 5228 bytes
font_01_sfnt_off00009165.bin
c7c247893c7aebf591c889e9ec441b4e860a76d2e9572c0ec4c3661c20a514dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9165 10148 bytes

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