Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5182def2da5b96d…

MALICIOUS

PDF

35.9 KB Created: 2020-08-04 15:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8e1eef1a7845596b2db64e2ac7b2635 SHA-1: 7e1813732f3313b2e50c288d657954a39e29989d SHA-256: a5182def2da5b96d072fb6144ce9367d2502e33f5e341ab28bd6e91014ac1ade
128 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to known malicious infrastructure, specifically ttraff.com. The document body, though heavily obfuscated, contains the same lure text and URLs found in the heuristics, indicating a deliberate attempt to trick the user into clicking a malicious link. The presence of numerous links to Shopify-hosted PDFs suggests a tactic to appear legitimate while masking the malicious redirector.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=concrete+and+abstract+nouns+worksheet+with+answers+pdf
    • http://files.pfcmooremess.com/uploads/1/3/0/7/130776072/65264bc54.pdf
    • http://rokoji.gkhcreative.com/uploads/1/3/1/4/131407227/f9c7f1a57e2.pdf
    • http://files.lifewisegifts.com/uploads/1/3/0/8/130874128/6ab8d3.pdf
    • http://files.ieleaders.net/uploads/1/3/0/7/130776718/45c35ab516bd.pdf
    • http://files.julliaraephotography.com/uploads/1/3/1/6/131637014/2061591.pdf
    • https://cdn.shopify.co
    • https://cdn.shopify.com/s/files/1/0434/5089/2440/files/35104913350.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8188/files/48131841586.pdf
    • https://cdn.shopify.com/s/files/1/0432/2073/0020/files/37815091635.pdf
    • https://cdn.shopify.com/s/files/1/0431/1253/0081/files/vixepezavujedejajisew.pdf
    • https://cdn.shopify.com/s/files/1/0440/0254/1726/files/juzewaxaxulinave.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7312/files/37829435617.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34680977850.pdf
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/fefofebuneturiwuxi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8920/6174/files/21877515322.pdf
    • https://cdn.shopify.com/s/files/1/0431/9019/0248/files/kowoxenizenodulufaguvo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/nejenomujerujo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/kijut.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_off00004edd.bin
5103492a7fd639ec199c1cd27e8b863a89e6b7a50c1cf53dcbcd42b28fff850e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4EDD 5412 bytes
font_01_sfnt_off0000614a.bin
c1f660b80abe37f6d367be99d1e127d99ec37fc3e474f0d20176c0caa7914b73
pdf-font-stream PDF embedded font (sfnt) at offset 0x614A 9620 bytes