Malicious PDF — malware analysis report

Static analysis result for SHA-256 90583366a20a8dee…

MALICIOUS

PDF

48.3 KB Created: 2020-09-07 20:29:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c197a97149f693e7ffbf0d7d173ad1d9 SHA-1: 7f2b2a8256ce3df718886a5903ff63bbf5ade9a9 SHA-256: 90583366a20a8dee9bfcd41e2474fb4a9b3fed7498391b833a0e9446383582af
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.me'. This URL is presented to the user as a download for 'Adobe Acrobat DC Standard Trial', a common lure. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to 'static.usrfiles.com', likely to improve search engine ranking for the lure. No scripts were extracted from this sample.

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.me/wix?keyword=adobe+acrobat+dc+standard++trial
    • https://static.usrfiles.com/ugd/8d5d69_cbf744228fd84f74b202bc503c4cae18.pdf
    • https://static.usrfiles.com/ugd/120f26_70713d2382d64402b2236fd906856498.pdf
    • https://static.usrfiles.com/ugd/02af14_8b2e5645004c4e6f832777f31eee8573.pdf
    • https://static.usrfiles.com/ugd/19103d_f930db4158f348d2a7f089281863f005.pdf
    • https://static.usrfiles.com/ugd/18122d_95ec78905970462aafd672087fbadd53.pdf
    • https://static.usrfiles.com/ugd/764aaa_53d13486428d4f6cbbb2015c2a430dd3.pdf
    • https://static.usrfiles.com/ugd/c836c3_9df30ca3be1742ed9ed951c81437fccd.pdf
    • https://static.usrfiles.com/ugd/73c254_485d7a4355be4b3f8d7df5287754b2b4.pdf
    • https://static.usrfiles.com/ugd/a8c229_8a2fe6aa17814cecb6d9863525820a17.pdf
    • https://static.usrfiles.com/ugd/b7ab08_3ab6b269d1e44a89b2eb5620fa69c299.pdf
    • https://static.usrfiles.com/ugd/5ea691_b891d25f867941ce9c21d2d15388c52a.pdf
    • https://static.usrfiles.com/ugd/97aff7_fcfaeaa15f8a49e79078dc593b64ca8f.pdf
    • https://static.usrfiles.com/ugd/ae15ca_1ceee1435db6417ebfa3e368a2c39c3e.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8529f23e5684facae91fdc610ea223f.pdf
    • https://static.usrfiles.com/ugd/3e0cb9_98ae9632fe934dc193ef84d26872ca2c.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005482.bin
5d76b9f44c5bea5b7d7e65ac1742eb1eef2d0a0bedea1f2c6afd430590136af0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5482 5236 bytes
font_01_sfnt_off000066ed.bin
4085380b61582de061ec0130dc869892cdffe4722da38eff3b2a7a9baa3c7972		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66ED 5060 bytes
font_02_sfnt_off0000782c.bin
5c5fcdb022066d98c85d8629fe1172365797ab150d37a65de070c44a24ef087b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x782C 10164 bytes
font_03_sfnt_off00009b2b.bin
6a519f54f5516a02950eed31c222a33217e1daf964577f37e3b402c146ae77cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B2B 16488 bytes

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