Malicious PDF — malware analysis report

Static analysis result for SHA-256 83e4a73d4dc315ea…

MALICIOUS

PDF

44.5 KB Created: 2020-08-12 17:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 640a7a8516c5ae147d8d74af4da9ea93 SHA-1: 3c74b1b7564011d9887acd00057fa16bac07b12e SHA-256: 83e4a73d4dc315eae926dfc33e1d833ea513176f1478fc938599d116c17f1e64
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body, though partially corrupted, contains the URL 'https://ttraff.com/pify?keyword=m72+law+manual+pdf', suggesting a lure to a malicious site. The presence of numerous Shopify-hosted PDF links indicates a link farm designed to improve search engine ranking for malicious 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=m72+law+manual+pdf
    • http://files.eventsmc2.com/uploads/1/3/1/4/131406182/6e0d45.pdf
    • http://files.castlehill-training.com/uploads/1/3/0/7/130739916/f19381b23d.pdf
    • http://files.lampstandlearningcenter.com/uploads/1/3/1/4/131453284/9778019.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3382/files/wella_koleston_color_chart.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/gekeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sakumuxapiwitisozu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/74346409932.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0541/files/zasovolagukalesafitifuram.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1623/files/17392735100.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/engineering_psychology_and_cognitive_ergonomics.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/48882117578.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/55537071461.pdf
    • https://cdn.shopify.com/s/files/1/0433/9010/7815/files/black_decker_cordless_trimmer.pdf
    • https://cdn.shopify.com/s/files/1/0431/0581/2629/files/zuzidodunetamarixuwa.pdf
    • https://cdn.shopify.com/s/files/1/0430/7936/8858/files/16847484091.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_off00007128.bin
40f94a8ad0fc2c40a6ee3ae9fd2e2cc8714ea9392d15ee11644d3cb54b290e92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7128 5220 bytes
font_01_sfnt_off000082fa.bin
70f786b9e26c6b9d788982f54bca4ecd739f60e59a515d466539145d551ccbba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82FA 10144 bytes

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