Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c6db9e8f7b8e540…

MALICIOUS

PDF

39.9 KB Created: 2020-08-01 08:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ecf93439e07b96cfe8f44bf0293d521 SHA-1: 09086628c0ae694d6e1ab305e8cce3faf7406a0c SHA-256: 1c6db9e8f7b8e5402953f6a06cb371b39aa917f1a193cab817960813e54d53ca
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=windows+xp+virtualbox+internet'. This indicates an attempt to direct users to a malicious site, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains the same URL, reinforcing its role as the primary lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, suggesting an attempt to obscure the ultimate destination or to leverage benign hosting for malicious links.

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=windows+xp+virtualbox+internet
    • http://files.charlesherndon.com/uploads/1/3/1/0/131071253/gufamo_pawukudurage_tedasamabiwaviw_vupazaduvet.pdf
    • http://files.varsitygoods.com/uploads/1/3/1/3/131380849/xatotagulome-wibebutuj.pdf
    • http://files.feshooterssupply.com/uploads/1/3/0/7/130739616/lafopufimirusu_poguzenafa_xibiselowakek.pdf
    • http://files.dgbrothers.com/uploads/1/3/2/3/132303019/pudeduw_pobij_magufofavijexe.pdf
    • https://cdn.shopify.com/s/files/1/0428/4894/4284/files/93606884075.pdf
    • https://cdn.shopify.com/s/files/1/0427/9903/8631/files/falajipikarowapo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7485/5846/files/37650830751.pdf
    • https://cdn.shopify.com/s/files/1/0433/2827/4587/files/repebedukuroxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4825/6156/files/wulebotezemojupopo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0412/4580/files/36165886872.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/tirizapefomabukiwexifilo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/26512844574.pdf
    • https://cdn.shopify.com/s/files/1/0435/6374/5441/files/dupigevubivadafoxowopowat.pdf
    • https://cdn.shopify.com/s/files/1/0433/8306/2678/files/fimujo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6249/3345/files/40468755515.pdf
    • https://cdn.shopify.com/s/files/1/0440/6122/9206/files/25076730475.pdf
    • https://cdn.shopify.com/s/files/1/0429/7234/8579/files/69496893349.pdf
    • https://cdn.shopify.com/s/files/1/0428/6454/1852/files/35392058501.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_off00005e3f.bin
0838a219a3ae3cf91929914848f880f81c561383a4a9cc9c7d0dcb501862b623
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3F 5328 bytes
font_01_sfnt_off00007080.bin
fc64a4ec51e823f96306c624e171709d0cb5b7a6c7c733174c00b0740eb1a656
pdf-font-stream PDF embedded font (sfnt) at offset 0x7080 9856 bytes