Malicious PDF — malware analysis report

Static analysis result for SHA-256 3134bbdc0427ff03…

MALICIOUS

PDF

45.0 KB Created: 2020-08-30 07:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51c0c4a18f46165797606bee0bfaac5a SHA-1: 48c4268ae1c4ca366806765c50d551b10cfdcd12 SHA-256: 3134bbdc0427ff03a000807720e07e89336e4d4e48d904e1290bd2c48d536590
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK indicating a link to ttraff.ru. This URL is part of a link farm designed to redirect users, as evidenced by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, contains the target URL and references to other Shopify-hosted PDF files, suggesting a content-luring or SEO-poisoning tactic.

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/wix?keyword=writing+a+friendly+letter+worksheet
    • https://cdn.shopify.com/s/files/1/0428/3518/1734/files/cv_template_word_photo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/chamakam_meaning_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0448/9238/9531/files/allan_quatermain_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/0410/6651/files/79228377238.pdf
    • https://cdn.shopify.com/s/files/1/0438/8411/8171/files/79305165012.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5465/files/52579704445.pdf
    • https://cdn.shopify.com/s/files/1/0448/4271/3249/files/characteristics_of_romantic_period.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6119/files/handover_letter_format_after_resignation_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/6187/0741/files/dolebadanegemunamowovozer.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8333/files/melokepame.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/49693121335.pdf
    • https://cdn.shopify.com/s/files/1/0439/3094/3643/files/21739304560.pdf
    • https://cdn.shopify.com/s/files/1/0433/3908/8022/files/europa_universalis_4_guide_steam.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_off00007104.bin
50b2bef1962ee812d15058444effee7e29afcab98e512927e9fccb18b28d7852		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7104 5440 bytes
font_01_sfnt_off0000839b.bin
60818bf3030549b7d8d6871e4aa91dc8993b975dbbf1e435adc0f9758cc5d811		 pdf-font-stream PDF embedded font (sfnt) at offset 0x839B 10304 bytes

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