Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f82f64358b47ac2…

MALICIOUS

PDF

47.6 KB Created: 2020-07-28 20:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3029b61e09c58d7f15adaf5364938132 SHA-1: 63758baa146a0d9d9113a4ee17421e0cb6ff26df SHA-256: 9f82f64358b47ac25f78de658bc4763c56fed2efa2bb3ea3f15d1cfaae725f5d
130 Risk Score

Malware Insights

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

The PDF file contains numerous links, a common tactic for SEO spam and phishing. One critical heuristic indicates a malicious redirector link to 'ttraff.ru', suggesting the document is designed to lead users to malicious sites. Another heuristic flags it as a PDF SEO link farm, with many links pointing to shopify.com PDFs. The document body, though heavily obfuscated, contains text related to 'abstract reasoning practice test', likely a lure. The presence of a download button heuristic further supports a malicious workflow.

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.ru/pify?keyword=abstract+reasoning+practice+test+5+pdf
    • http://files.lizarios.com/uploads/1/3/1/4/131406797/bixenigevaj.pdf
    • http://files.ccmein.org/uploads/1/3/1/6/131607075/xusitodizej_benipizabu_bidewolegin_zarela.pdf
    • http://files.youtwocantango.com/uploads/1/3/1/3/131383478/8e8c5d82.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/wekamapaxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/7630/5564/files/fugelosabevexaze.pdf
    • https://cdn.shopify.com/s/files/1/0435/0767/9387/files/60946627506.pdf
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/muvorebesakus.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/1082838963.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/jekidegoga.pdf
    • https://cdn.shopify.com/s/files/1/0429/7578/9215/files/pojefesefivelamamado.pdf
    • https://cdn.shopify.com/s/files/1/0431/8897/7815/files/39204898057.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7980/files/31376115101.pdf
    • https://cdn.shopify.com/s/files/1/0435/4169/2570/files/96739212001.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/wofovofujuxibogu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4375/files/fapezofaguzitibemub.pdf
    • https://cdn.shopify.com/s/files/1/0440/7335/3381/files/jetobedolumoz.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://cdn.shopify.com/s/files/1/0430/6678/5949/files

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c24.bin
dbf46fbc53bb3b3f9fcad466dbfd1dcb6d56e22b9ac84a799c413d83c82e4a19
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C24 5332 bytes
font_01_sfnt_off00008e43.bin
901f57a423fa7ccc1d432b8d862a0fa72c3cb2a958170ffca19ff6d581ae8d51
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E43 10340 bytes