Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b5fddf2f9dc93a0…

MALICIOUS

PDF

39.5 KB Created: 2020-08-31 06:17:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7561d791e78e1fc3a1be985423013b62 SHA-1: 37e54c6b036984abd1201c27ebe3ad243e29168d SHA-256: 3b5fddf2f9dc93a0666a610cf2924bf1a271ee3753616feaa4d026b03e18210d
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL and a seemingly benign link, suggesting a lure to trick the user into clicking the malicious URL. The presence of a link farm heuristic further indicates an attempt to distribute malicious content through numerous 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.cc/wix?keyword=aaron+marshall+britain%2527s+got+talent
    • https://cdn.shopify.com/s/files/1/0434/4040/6684/files/bach_cello_suite_no._1_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0465/8806/8005/files/adjectives_to_describe_physical_appearance_and_personality.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/75455468633.pdf
    • https://static.usrfiles.com/ugd/12f4eb_cf43e7e29f564020b31bbecd34ec7f5f.pdf
    • https://static.usrfiles.com/ugd/7598fa_6da136955adb465f8fcfaaaf304f30ca.pdf
    • https://static.usrfiles.com/ugd/289c5e_85bef35d8c7648f4a89273d9e3f96d71.pdf
    • https://static.usrfiles.com/ugd/87d215_5addf97e3f3e4f1eb6c6f2beca235157.pdf
    • https://static.usrfiles.com/ugd/5be868_359354d7400742a0a5152d22f88de147.pdf
    • https://static.usrfiles.com/ugd/e3ff21_5bebeb326fe149ce9e1732275e4ebda4.pdf
    • https://static.usrfiles.com/ugd/f09a9d_8d2c93540c5d43f5beeff171b30f2ea9.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/fifezuwafoxifusez.pdf
    • https://cdn.shopify.com/s/files/1/0433/7546/0515/files/58726043162.pdf
    • https://cdn.shopify.com/s/files/1/0437/6464/6040/files/200-_120_ccna.pdf
    • https://cdn.shopify.com/s/files/1/0428/0965/5462/files/gogukuvopax.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_off00005c1c.bin
3c2903a5b2770b51cb6e25656b5eae81080de70bd08ff4b4f5263844af6f8bb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C1C 5260 bytes
font_01_sfnt_off00006dd6.bin
5f2c258570cc421084a9ff72bb96494b370850ffb62a4b7b237c30146fcd7547		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD6 10328 bytes

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