Malicious PDF — malware analysis report

Static analysis result for SHA-256 25acfc4d0f28b920…

MALICIOUS

PDF

61.4 KB Created: 2020-08-31 19:37:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b4bf78f38ba5766edd9fab3bc188de6 SHA-1: 2838150b58bfb07d81c08d46ef8c46c318427145 SHA-256: 25acfc4d0f28b9203c0764d92ff3260e817e33241d2a06d9945b90d9dac27084
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=forefoot+adduction+deformity'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. The presence of numerous other PDF links, many hosted on Shopify and static.usrfiles.com, suggests a link farm or SEO poisoning tactic to distribute the malicious redirector. No scripts were extracted, and the document body is heavily obfuscated, but the malicious link is the clear indicator of compromise.

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.com/wix?keyword=forefoot+adduction+deformity
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/21033151113.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3143/files/78009339593.pdf
    • https://cdn.shopify.com/s/files/1/0430/7465/0261/files/proshow_gold_full_trke_cretsiz_indir.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0872/files/66215081742.pdf
    • https://static.usrfiles.com/ugd/8ab72e_588d18827c44434095a4bf4c312536c8.pdf
    • https://static.usrfiles.com/ugd/b7ed05_c9d7e5751530463aa1ffa9d00d77f0ab.pdf
    • https://static.usrfiles.com/ugd/f09a9d_53b4f875eda744d2936e0ccafda1f2e4.pdf
    • https://static.usrfiles.com/ugd/7603ae_58a62b38bffe436db8654b9cf1eeadf6.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2a30a9a72904156b09b47f6b151624a.pdf
    • https://static.usrfiles.com/ugd/4c1554_f94bf78d955749849834315db2eb0e11.pdf
    • https://static.usrfiles.com/ugd/b8c837_479b3f72c64e40299062c282b159bf7e.pdf
    • https://static.usrfiles.com/ugd/b8c837_a1c7bc2589ff442eaeb0f013c4b53601.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a521.bin
921d615c3af2f719d7e2cab56f351ba8d3a09cf5307d3634f794e2f68ac7e020		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA521 4896 bytes
font_01_sfnt_off0000b5b0.bin
24f17ea9fb9d4c3e957d29edaf8c392252e7db46a3db8580ef4e9f7ce3e8b8ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5B0 10908 bytes
font_02_sfnt_off0000daf1.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF1 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.