Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffaf24f5c17f274c…

MALICIOUS

PDF

38.4 KB Created: 2020-08-21 11:24:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ea1393d4508b7e0f16a020ebd573cd9 SHA-1: ce0782d7bbf45f2f750c6d41f65039c04d36e3d9 SHA-256: ffaf24f5c17f274c5d763b36b3a8a2efa537ed11234649c79cc6d5064ecd64c0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.003 Windows Command Shell

The PDF contains a high number of embedded links, many pointing to Shopify domains, but also includes a critical link to a known malicious redirector at `ttraff.ru`. The heuristic `SE_LOLBIN_RUN_COMMAND` indicates that the document may contain instructions for executing commands, likely to facilitate the redirection or download of further payloads. The document body itself is heavily obfuscated but contains the malicious URL, suggesting a lure to a resource that is likely malicious.

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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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=admiralty+notices+to+mariners+free
    • http://files.littlemonkeyscafe.com.au/uploads/1/3/0/9/130969061/3519794.pdf
    • http://files.whalingconference.org/uploads/1/3/1/3/131381078/bawupogexu.pdf
    • http://nafumug.chuckpotterart.net/uploads/1/3/1/3/131382406/mibitifujova.pdf
    • http://files.holisticwellnessny.com/uploads/1/3/1/4/131454560/31b30.pdf
    • http://files.selectstartpress.com/uploads/1/3/1/3/131383837/biwowo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1770/7425/files/bewojikukivaremunumuvaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/2771/0630/files/53534216447.pdf
    • https://cdn.shopify.com/s/files/1/0435/2606/2239/files/54875817067.pdf
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/87974677163.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9069/files/mudenixuki.pdf
    • https://cdn.shopify.com/s/files/1/0435/1416/7455/files/94340515689.pdf
    • https://cdn.shopify.com/s/files/1/0432/8099/0366/files/ludanim.pdf
    • https://cdn.shopify.com/s/files/1/0444/4323/8567/files/d_d_5_unearthed_arcana.pdf
    • https://cdn.shopify.com/s/files/1/0431/4077/6093/files/kovoviluma.pdf
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/curl_file_from_url.pdf
    • https://cdn.shopify.com/s/files/1/0433/8132/5987/files/abhishek_kumar_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4175/files/6110752004.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_off000058d0.bin
c37009fc4688c122f38c3ae449bf731e9c33c2a588c03f00d88037b437d59f5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x58D0 5256 bytes
font_01_sfnt_off00006a99.bin
7c73f945f6915802fdfb0c66c28ddea9a4dd65f328a37ff40cae73d79ce53287
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A99 10040 bytes