Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3ccb7fe9b8e0387…

MALICIOUS

PDF

41.6 KB Created: 2020-08-15 04:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d2149e6c3df23cfd4d6d4804569ad02 SHA-1: 85692716b04ac651daf762240774cd2f8af6038b SHA-256: b3ccb7fe9b8e038749c47c95c30ef96d8b6f1a399cd071f828ae25f8083da7bd
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wb?keyword=percentages%20worksheets%206th%20grade'. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily corrupted, contains fragments of the redirector URL and references to educational content, suggesting a lure to disguise malicious activity. No scripts were extracted from this sample.

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.com/wb?keyword=percentages%20worksheets%206th%20grade
    • http://files.barrettfineartadvisory.com/uploads/1/3/1/4/131483138/5874297.pdf
    • http://kibelovud.thegreedycouple.com/uploads/1/3/0/8/130814328/5a79bd351.pdf
    • http://files.southlandfamilyclub.com/uploads/1/3/1/3/131379371/e862cb.pdf
    • http://files.adamflemmingdesign.com/uploads/1/3/2/7/132712251/9971455.pdf
    • http://files.123tkd.net/uploads/1/3/0/7/130775846/cb40413f.pdf
    • https://cdn.shopify.com/s/files/1/0435/3366/4420/files/taxenunadezuwaxepexozudug.pdf
    • https://cdn.shopify.com/s/files/1/0431/8927/2725/files/email_examples_for_business_communication.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muzaloxebomasu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12086745869.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.pdf
    • https://cdn.shopify.com/s/files/1/0439/0476/2011/files/36863102496.pdf
    • https://cdn.shopify.com/s/files/1/0431/5761/8850/files/ruduv.pdf
    • https://cdn.shopify.com/s/files/1/0446/7766/0825/files/alfa_laval_shell_and_tube_heat_exchanger.pdf
    • https://cdn.shopify.com/s/files/1/0432/3291/9720/files/58198477167.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6828/files/bapumitofegozusozipax.pdf
    • https://cdn.shopify.com/s/files/1/0431/8930/5501/files/wuwusopugol.pdf
    • https://cdn.shopify.com/s/files/1/0445/6746/2047/files/convert_into_word_doc_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/6773/6225/files/initial_stage_crossword_answer.pdf
    • https://cdn.shopify.com/s/files/1/0432/9114/8454/files/comparative_adj_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/6987/4080/files/past_simple_regular_verbs_activities.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_off00006369.bin
7d4fb4bd0fc3180ffe24c801941b0411de40aa3dadd38ef86a53a57c13c2f4a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6369 5480 bytes
font_01_sfnt_off00007613.bin
133717f8bcc4df77496b184f9235107d01de4b239477ecd669fa47654039fb4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7613 10248 bytes