Malicious PDF — malware analysis report

Static analysis result for SHA-256 890568ffff17cdf5…

MALICIOUS

PDF

42.7 KB Created: 2020-08-29 07:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae2e5a7f1586c6068b1a19cc4a6f31d9 SHA-1: 4400220939358a97138ad3abc55920b97936ba8b SHA-256: 890568ffff17cdf5e4cb775c8062595ae40906aaee1842dc390f5709adbaeaa9
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.club'. The document body, though heavily obfuscated, contains text related to 'Clinical procedures in emergency med' and the malicious URL, suggesting a lure for users interested in medical information. The presence of PDF-specific heuristics for malicious redirectors and link farms strongly indicates an attempt to drive traffic to malicious infrastructure.

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.club/wix?keyword=clinical+procedures+in+emergency+med
    • https://cdn.shopify.com/s/files/1/0434/9083/6632/files/sodavufexubam.pdf
    • https://cdn.shopify.com/s/files/1/0427/8288/4006/files/best_football_games_for_android_2018.pdf
    • https://cdn.shopify.com/s/files/1/0443/3536/6300/files/tumor_maligno_de_pancreas.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5085/files/zalipurub.pdf
    • https://cdn.shopify.com/s/files/1/0452/7502/1474/files/best_auto_repair_manuals_reviews.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3552/files/bifivizusa.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/jemodetenunigupajerosi.pdf
    • https://cdn.shopify.com/s/files/1/0450/8542/5829/files/northern_blotting_applications.pdf
    • https://static.usrfiles.com/ugd/b8c837_c073f7fb8983403b8d56dcbab6aafbb8.pdf
    • https://static.usrfiles.com/ugd/b8c837_855ca7ec8356434e95e65ac1894efbc8.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a5b6d53e0354f29a2cb0745f6f9c41c.pdf
    • https://static.usrfiles.com/ugd/b8c837_321509018dc64367ae7f55a15431404a.pdf
    • https://static.usrfiles.com/ugd/b8c837_d03c5b973cf44b979260c8ccfe8d9224.pdf
    • https://cdn.shopify.com/s/files/1/0435/5679/8615/files/37037079060.pdf
    • https://cdn.shopify.com/s/files/1/0429/9941/4947/files/26397123843.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/
    • https://static.usrfiles.com/ugd

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006867.bin
acdf1055ebccbb68318363cab8f14d5f0b959f061ea9aee7d5da82ba41871ecb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6867 5400 bytes
font_01_sfnt_off00007aa2.bin
c52b2808f38dda53ead7373249102cc3a04950aeeb6c3b6345c6a78c8d720300
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA2 10196 bytes