Malicious PDF — malware analysis report

Static analysis result for SHA-256 91b617eb916e1bc8…

MALICIOUS

PDF

54.2 KB Created: 2020-08-23 21:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 722418fc3dc66870450e5d76074bfd4e SHA-1: f395c92dea426350e096eb896016c85e10e2264d SHA-256: 91b617eb916e1bc89575f75822953698d1cf3193147457467981a12ac68f6e35
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a prominent link disguised as a "calendar app ios free" download. This link redirects to a malicious URL (ttraff.com), indicating a phishing or malware distribution attempt. The PDF also contains a large number of external links, many hosted on Shopify, which is characteristic of SEO link farm abuse to obscure the malicious redirect. The document body is heavily obfuscated, but the presence of the malicious redirector and the link farm strongly suggest a malicious intent to lure users to harmful content.

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/pify?keyword=calendar+app+ios+free
    • http://files.desjardinsproinsp.com/uploads/1/3/2/6/132681976/ginuta.pdf
    • http://files.albatrosscharters.co.nz/uploads/1/3/2/6/132681560/daf4a37c.pdf
    • http://files.balloondecorators.ca/uploads/1/3/1/4/131438120/d08c4.pdf
    • https://cdn.shopify.com/s/files/1/0437/4301/9159/files/maxilovemuzefejo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1502/0448/files/76250769548.pdf
    • https://cdn.shopify.com/s/files/1/0432/1493/0084/files/pdf_architect_4.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/chaos_theory_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0432/7876/2139/files/hindustan_unilever_ltd_annual_report_2015-_16.pdf
    • https://cdn.shopify.com/s/files/1/0429/1156/3932/files/87959049880.pdf
    • https://cdn.shopify.com/s/files/1/0435/2730/7416/files/kofavurixurafewite.pdf
    • https://cdn.shopify.com/s/files/1/0440/5601/9109/files/zepakolifedovorapebewina.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9398/files/2434584162.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6663/files/sociology_101_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/8135/7725/files/git_merge_two_repositories.pdf
    • https://cdn.shopify.com/s/files/1/0437/1608/3877/files/foxovojisabafewupu.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_off00009802.bin
36b36b7a17d94d807a8d014176dab6ec3c3a8a2f49158cd4e1a04cf03f1f02e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9802 4940 bytes
font_01_sfnt_off0000a8d7.bin
704fef50e634893c136cdc16b286df40e8d5ca12031efa700d90efbbdb4b469a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8D7 10288 bytes

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