Malicious PDF — malware analysis report

Static analysis result for SHA-256 efa3d31ce62372ba…

MALICIOUS

PDF

63.1 KB Created: 2020-08-11 03:59:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60487fce5dd459fdcd7a2dd3c9f3746e SHA-1: 2fef2981812735165a73915fbcf526754b88c6d8 SHA-256: efa3d31ce62372ba103f51ba0308503d1ce2d475cf07e9eaea9be4f623a5ae9f
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 one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary malicious URL, 'https://ttraff.ru/pify?keyword=schwing+stetter+batching+plant+m1+pdf', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is a key component of the attack. The presence of numerous links, including those hosted on cdn.shopify.com, indicates a likely attempt to lure users to malicious sites.

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=schwing+stetter+batching+plant+m1+pdf
    • http://pisan.simpleauthenticwellness.com/uploads/1/3/2/6/132683051/8557482.pdf
    • http://wonapipux.chanandreassend.co.nz/uploads/1/3/1/4/131436978/fogimutinekux_kafuza_xulese.pdf
    • http://files.centerstagetheatrecompany.org/uploads/1/3/1/4/131406049/wonazanetez-madoxigiba.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0431/8350/5562/files/dizizepajobuke.pdf
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/89581351530.pdf
    • https://cdn.shopify.com/s/files/1/0434/8516/7766/files/4866462175.pdf
    • https://cdn.shopify.com/s/files/1/0438/4600/8982/files/convert_indd_to_online.pdf
    • https://cdn.shopify.com/s/files/1/0437/1379/0106/files/capf_assistant_commandant_previous_question_papers.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0499/files/beckmann_and_ling_s_obstetrics_and_gynecology_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/9548/1750/files/sosubidozokufatawisasom.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/wowen.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39720928980.pdf
    • https://cdn.shopify.com/s/files/1/0438/4686/0957/files/84415871741.pdf
    • https://cdn.shopify.com/s/files/1/0430/6783/4517/files/atom_history_timeline.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65039204935.pdf
    • https://cdn.shopify.com/s/files/1/0428/1614/3526/files/cambridge_english_worldwide_starter_student_s_book.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000dea7.bin
565c7e98c9797cbb99345ed7b4857fb3c9722365dbcc6301691fe78415096b55
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDEA7 4256 bytes
font_00_sfnt_off0000a6cf.bin
3d4cb71b34f88c1aedf4ede4c65949674258b1835a67d787e3aa0e6cafceb781
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6CF 5956 bytes
font_01_sfnt_off0000baf0.bin
eef88ac5dce98bac9e62fed9f3491f524b532f9b6013f22604862e42b344211b
pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF0 10376 bytes