Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddfcb3da7fd79c7b…

MALICIOUS

PDF

43.7 KB Created: 2020-07-31 05:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2abe0f529250b02478fb64af94ca4d8 SHA-1: 43083c3e31d2bbb2ffedbb5ac56b51af4eca32e9 SHA-256: ddfcb3da7fd79c7bb1c47478c8b3ef9a59fac7e42b952e6503456360f2b0fd80
162 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic indicates that the document links to known malicious redirector infrastructure via the URL https://ttraff.ru/pify?keyword=pf+withdrawal+form+pdf. Another heuristic flags the document as a PDF link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The presence of a 'LOLBin Run Command' heuristic indicates that the document may contain instructions for executing commands on the user's system, likely to facilitate further malicious activity.

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=pf+withdrawal+form+pdf
    • http://files.artisanseaglassjewelry.com/uploads/1/3/1/3/131383377/f2c68371.pdf
    • http://files.topnotchphorses.com/uploads/1/3/0/7/130775106/a20fdb156.pdf
    • http://files.powershellder.com/uploads/1/3/0/7/130775352/b6539eadb2.pdf
    • http://files.appletreekidz.com/uploads/1/3/0/7/130740462/acc09e8ed.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0428/3292/0739/files/99717452653.pdf
    • https://cdn.shopify.com/s/files/1/0440/1607/4902/files/zoputibetodi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8425/9231/files/gufesafodelutevamatifobav.pdf
    • https://cdn.shopify.com/s/files/1/0428/7630/5564/files/jusekovi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3864/5144/files/xofedejadowa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0441/1556/files/mujudezulu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/garimovomoremosumani.pdf
    • https://cdn.shopify.com/s/files/1/0438/4922/0256/files/42186082565.pdf
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/xedijefimirek.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/fazemixigabi.pdf
    • https://cdn.shopify.com/s/files/1/0438/8637/9160/files/7637014486.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_off00006ee6.bin
1dcce0299cc28fd3aed22e39364ae7cd708c1e936da7a758d4333dc1443a191d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE6 4760 bytes
font_01_sfnt_off00007f10.bin
da1cf0af6822ce923d9270f583043db3b348e30e0ffc684ad0e5831037b73816
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F10 10212 bytes