Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa85e1af0d69cbb…

MALICIOUS

PDF

41.4 KB Created: 2020-08-07 16:11:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a678ae1c81cc7df48a846e9f1bab1d6 SHA-1: 67c98413e0836adf7ce2ac4bd8b8a391df2d366f SHA-256: 7fa85e1af0d69cbbafa1d3c22f31bd0d4feda01132b975c12bdeb8a5d1f8557f
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. The primary malicious URL identified is https://ttraff.ru/pify?keyword=como+cambiar+un+archivo+pdf+en+ingles+a+espa%25C3%25B1ol, which is flagged as a malicious redirector. The document body, though partially corrupted, includes this URL and a title suggesting a lure for users seeking file conversion help, aligning with phishing or malware distribution schemes. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.ru/pify?keyword=como+cambiar+un+archivo+pdf+en+ingles+a+espa%25C3%25B1ol
    • http://files.durhamcoc.com/uploads/1/3/0/9/130969220/logabok.pdf
    • http://files.scautoservices.co.uk/uploads/1/3/2/7/132712127/xupivaki.pdf
    • http://files.seniors-who-care.com/uploads/1/3/2/8/132814996/a3b5efebd2b4.pdf
    • http://files.jason-fritz.com/uploads/1/3/1/3/131398117/bapoga.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/gipadujosiji.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/veserezidevuwawusiben.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/94764577287.pdf
    • https://cdn.shopify.com/s/files/1/0434/8837/9032/files/93896713403.pdf
    • https://cdn.shopify.com/s/files/1/0435/7881/8715/files/construction_management_fundamentals_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/6213/0853/files/gipoxevapakapojepedipig.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/agents_of_socialization_in_sociology.pdf
    • https://cdn.shopify.com/s/files/1/0431/8658/5749/files/61164322431.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/dubavelif.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/vepuxufajiponajavomolubi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8910/7869/files/64375645163.pdf
    • https://cdn.shopify.com/s/files/1/0440/2076/0734/files/mt_hood_meadows_weather.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_off00005f7f.bin
2f56fe6593b6cc3ec76756fccece3bf4c50d9b4d0dc4cd3b28155e3f76569ca0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7F 5884 bytes
font_01_sfnt_off0000731f.bin
0ac1394df60fd1fd7d8e2561fffac2c88010a725bfafae85f15ee68c96c9e3b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x731F 10732 bytes