Malicious PDF — malware analysis report

Static analysis result for SHA-256 edcbb90a5c0d6f14…

MALICIOUS

PDF

33.2 KB Created: 2020-08-23 13:21:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b2873ffe9b9e030d12d72b3de50a84a SHA-1: 1cc9da8513289429bd124696b67c74a2a66f15a5 SHA-256: edcbb90a5c0d6f14c2203ec0ed65c1a968e4bfbbfef184fe4c358de274310c39
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=belarus+250+tractor+service+manual'. This URL is presented within the document body, disguised as a service manual, to entice users to click. The PDF also contains a large number of embedded links, many of which point to external PDFs, suggesting a link farm or SEO poisoning attempt. The primary malicious URL redirects to further infrastructure, indicating a likely phishing or malware distribution attempt.

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=belarus+250+tractor+service+manual
    • http://tufufobaj.visionquest50.com/uploads/1/3/1/4/131452903/beruzimiwefuju.pdf
    • http://files.irnawards.co.uk/uploads/1/3/1/3/131380292/noxenirejepat_bisexi.pdf
    • http://files.sapnodesignstudio.com/uploads/1/3/2/6/132695203/259347cef4beb.pdf
    • https://cdn.shopify.com/s/files/1/0451/0469/3400/files/84279360020.pdf
    • https://cdn.shopify.com/s/files/1/0430/3811/3955/files/11544844620.pdf
    • https://cdn.shopify.com/s/files/1/0435/3920/2207/files/super_mario_sunshine_iso.pdf
    • https://cdn.shopify.com/s/files/1/0449/9508/4452/files/act_practice_math_tests.pdf
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/21147711657.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/zozogedete.pdf
    • https://cdn.shopify.com/s/files/1/0454/8486/7736/files/wudenikimasebotofutar.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/kufaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/4285/6344/files/20331586775.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_off000042bb.bin
5cea74df67c9e103cf287a5c75435baae38c6a7c17d44dd845e03613dd62193c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42BB 5452 bytes
font_01_sfnt_off00005532.bin
d57e1639b1246bc2dab505939d604f52e2fbff3c17df3857086b06f9eb9c7d44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5532 10216 bytes

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