Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f27e29641a4eb1…

MALICIOUS

PDF

48.8 KB Created: 2020-08-07 13:38:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 971b5367bdc7881169d5d83e9a29de43 SHA-1: 38f7bd55e13fbb8842d8ba2bef463e3091ad6dc5 SHA-256: 20f27e29641a4eb1608e780de4288bb3b4ffd5372b12e13e8e39f602d914b820
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, appears to contain this URL and a large number of other URLs, many hosted on Shopify, suggesting a link farm or redirection strategy. The primary malicious URL is likely used to redirect the user to a further stage of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=volume+of+3d+shapes+formulas+pdf
    • http://files.rmtta.com/uploads/1/3/1/3/131381679/1063620.pdf
    • http://files.jennygass.com/uploads/1/3/0/8/130813079/aee7e7.pdf
    • http://files.russianinscotland.com/uploads/1/3/2/7/132712040/wasemoxenapasuni.pdf
    • http://files.thethunderdownunder.org/uploads/1/3/0/8/130874328/8935282.pdf
    • http://files.supernaturaltraveler.com/uploads/1/3/0/7/130740213/f66b3e7f23d50.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2069/files/29518899825.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6928/files/2449258440.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/64886116048.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1520/files/14816034696.pdf
    • https://cdn.shopify.com/s/files/1/0434/6337/7048/files/93984256727.pdf
    • https://cdn.shopify.com/s/files/1/0430/9689/9745/files/cub_cadet_1450.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0423/files/bivujofapavarugosenojisur.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/fallout_76_fusion_generator.pdf
    • https://cdn.shopify.com/s/files/1/0437/4226/5498/files/merulad.pdf
    • https://cdn.shopify.com/s/files/1/0436/2056/5156/files/noxere.pdf
    • https://cdn.shopify.com/s/files/1/0428/6123/2294/files/7825667371.pdf
    • https://cdn.shopify.com/s/files/1/0432/2813/5592/files/11055829556.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
font_00_sfnt_off00006bc0.bin
e8d490905a0e1c4f9e9ba88b2790600b8946f5b897160ce531efda8bc85f2099
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC0 5412 bytes
font_01_sfnt_off00007e06.bin
919de4855f4d626a7157fac272ea6cc8d4bd395568217990594e4248c0069abf
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E06 10132 bytes
font_02_sfnt_off0000a106.bin
83584419218d40bdc96a2934431814a78dc441f63de5b9e99774fbb65ef3d982
pdf-font-stream PDF embedded font (sfnt) at offset 0xA106 16080 bytes