Malicious PDF — malware analysis report

Static analysis result for SHA-256 988993846bdff10e…

MALICIOUS

PDF

36.9 KB Created: 2020-09-08 15:37:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd7a0d0b7326623d89c53ed7e55f1438 SHA-1: 2ac32228825ea58f86d4184e7648d851686af648 SHA-256: 988993846bdff10e2db34e2894bf53890d8bf09e57377cb1ec0e468dcbf80030
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for tutorial files. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the link points to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, likely for SEO manipulation or to spread the malicious link. The SE_DOWNLOAD_BUTTON heuristic further supports the lure of a download. No scripts were extracted, but the primary attack vector is the malicious link.

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.club/wix?keyword=3ds+max+tutorial+files
    • https://static.usrfiles.com/ugd/956c05_1a0f78d3628f4b2598a3c6f86d252b89.pdf
    • https://static.usrfiles.com/ugd/7f16bd_ba36513d6181488a9fc313fae7ed9dad.pdf
    • https://static.usrfiles.com/ugd/b8c837_846036e69e6343b0b7201ca470aaed1e.pdf
    • https://static.usrfiles.com/ugd/7dd30d_4122147fb7d441fabe453b73f600d92e.pdf
    • https://static.usrfiles.com/ugd/afe78f_a1639878ee37406d8ff897a4a9272993.pdf
    • https://static.usrfiles.com/ugd/3d7af5_00e682327a1c45a6ab37c6262d3c6651.pdf
    • https://static.usrfiles.com/ugd/3c2969_0842f14a820a4c35b9c9514dfaf3ab68.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_8e182dfe2660431ea2f25880932cc066.pdf
    • https://static.usrfiles.com/ugd/2ac701_1e470daae278477596e53a325ea89aaf.pdf
    • https://static.usrfiles.com/ugd/2ac701_561a0ef9bea34480a915380f71bb4736.pdf
    • https://static.usrfiles.com/ugd/9e41f0_7859211817d2403aa303b1eb6f0af55e.pdf
    • https://static.usrfiles.com/ugd/b8c837_92714335c5ad41e687bb64fbbea628dd.pdf
    • https://static.usrfiles.com/ugd/e33828_53eb5ebfbadf41908c0c2ee5a4d67879.pdf
    • https://static.usrfiles.com/ugd/4dd980_4aa8d694fbfe4898a77c27ef4fdbeffb.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_off0000540e.bin
25f590ce479696b406b987c4ba19ef97bd89a3560596af31021d2862cd81304c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x540E 5192 bytes
font_01_sfnt_off0000659a.bin
dd4ea62ec20fba56526d775c572b09d6f3b6b8436a55be35829014db9f631762		 pdf-font-stream PDF embedded font (sfnt) at offset 0x659A 9824 bytes

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