Malicious PDF — malware analysis report

Static analysis result for SHA-256 41620f1cef539eb7…

MALICIOUS

PDF

38.5 KB Created: 2020-08-18 20:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f72a806b9cceffeaa7a046339b1ca3c SHA-1: 0d9fcaaa215d6e353b40dfee4a369bd7e21bf154 SHA-256: 41620f1cef539eb7cac61b2fc3ad3f51f109936e97a8f12b49a5cad0544f2d4a
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to ttraff.ru. The document body, though heavily obfuscated, contains a URL that appears to be a lure for movie content, which aligns with the redirector's purpose. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are hosted on Shopify. The primary malicious IOC is the ttraff.ru redirector URL.

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=minions+full+movie++dual+audio+480p
    • http://files.cafecopasetic.com/uploads/1/3/1/3/131381204/c49c8c678c719.pdf
    • http://files.nicolemillersandiego.com/uploads/1/3/1/3/131379692/fe88a2f2.pdf
    • http://benowasi.oasis-ministries.org/uploads/1/3/1/3/131398243/63b1f9e8293f3.pdf
    • http://files.gsadaptivesports.org/uploads/1/3/1/0/131070116/e7d9cb82b99f.pdf
    • http://natat.southbaymusicschool.info/uploads/1/3/1/3/131378985/nenudigasunaxeb-jomutobiluwopud.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/pizudupuxelibob.pdf
    • https://cdn.shopify.com/s/files/1/0456/8258/9855/files/5619208984.pdf
    • https://cdn.shopify.com/s/files/1/0437/6041/8970/files/rikawokuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/types_of_networking_cables_and_connectors.pdf
    • https://cdn.shopify.com/s/files/1/0437/2817/5265/files/83303894641.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1417/files/nios_deled_assignment_cover_page.pdf
    • https://cdn.shopify.com/s/files/1/0435/1157/8776/files/gafuxisurom.pdf
    • https://cdn.shopify.com/s/files/1/0439/6656/2462/files/55974579738.pdf
    • https://cdn.shopify.com/s/files/1/0439/2858/4347/files/49836297638.pdf
    • https://cdn.shopify.com/s/files/1/0437/4354/3450/files/teribukasule.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5254/files/92130307848.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3749/files/dedumenekobunafok.pdf
    • https://cdn.shopify.com/s/files/1/0433/8984/5671/files/winidozuwidom.pdf
    • https://cdn.shopify.com/s/files/1/0431/9019/0248/files/ninoxefuza.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/1/0431/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053cd.bin
743a0e46c4d30fec6f0f096cb56210a1ca492552bcc7e6c6c56b7e03b8156a03
pdf-font-stream PDF embedded font (sfnt) at offset 0x53CD 5580 bytes
font_01_sfnt_off000066c5.bin
12b79c985946021267c527a37d2ccc550218e5a4f9e654711a6514ec56dc5acb
pdf-font-stream PDF embedded font (sfnt) at offset 0x66C5 11712 bytes