Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7c95fc025a738ad…

MALICIOUS

PDF

46.3 KB Created: 2020-09-13 17:38:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfd83b17eb1cac566109b66c5d33d6b7 SHA-1: 66862a1eee9cb169af64dbf409df6ff6bfb327fd SHA-256: b7c95fc025a738ad46a5b9a1d354a3e820bbcb4c92457f35619244f50443cedf
154 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.me/wix?keyword=timex+ironman+triathlon+8+lap+watch+manual`. Additionally, it exhibits a PDF link farm with numerous external PDF links, many of which are hosted on seemingly unrelated domains. This suggests a coordinated effort to distribute malicious content or engage in SEO poisoning to lure unsuspecting users. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=timex+ironman+triathlon+8+lap+watch+manual
    • http://files.4seasonsirrigationandlandscape.com/uploads/1/3/1/4/131453674/piwinewuvozida_sigoron_gozadedezijatuj.pdf
    • http://dajeral.amygrochowski.com/uploads/1/3/1/1/131164250/bc0499.pdf
    • http://files.greentreeassociation.com/uploads/1/3/1/4/131453725/liwekinaj_juladax_numamaduwiwule_bigetane.pdf
    • http://vapigupi.saintgregorysileby.org/uploads/1/3/1/3/131380934/kotebogisarisaf-folijoma-rojugizaj.pdf
    • http://files.jennymontenegroyoga.com/uploads/1/3/1/0/131070051/4273382.pdf
    • http://gikejixot.breastcancerstartupchallenge.com/uploads/1/3/2/7/132712461/wevetejexol.pdf
    • http://files.spiritwordchurch.co.uk/uploads/1/3/1/4/131406344/bujuvusar-velewegox.pdf
    • http://files.whiterivermwd.com/uploads/1/3/2/7/132740637/7157581.pdf
    • http://files.lvsports.org/uploads/1/3/2/6/132682663/5e9b0ed629e.pdf
    • http://files.heartlandirishdancers.com/uploads/1/3/2/7/132712096/ribax.pdf
    • http://files.lasvegasorientalmedical.com/uploads/1/3/2/6/132681928/870f5dc9346fef1.pdf
    • http://files.truecalif.com/uploads/1/3/1/3/131380480/7788489.pdf
    • http://pagisug.cushmanmusic.com/uploads/1/3/2/7/132740623/1e8192fbdf3a8f3.pdf
    • https://static.usrfiles.com/ugd/0dd040_e47677998c4b42db9c3b7a325ebb869a.pdf
    • https://static.usrfiles.com/ugd/29c71c_66521d87daa644669b02d4ae8deba788.pdf
    • https://static.usrfiles.com/ugd/24deb6_36fdc5193c9f4b9889d3a45e5b4dc886.pdf
    • https://static.usrfiles.com/ugd/6908d7_c690412d597c44d892639b7328eaad43.pdf
    • https://static.usrfiles.com/ugd/f35da0_8ce29db1068a4e3e91a1b8815be17c13.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_off00007746.bin
e6923105520864d54c4c73fe27a6e9317ee0a647e47823559029d8d3012b6f12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7746 5300 bytes
font_01_sfnt_off00008936.bin
fd31d9addcf3d9ee2de76f2ad93db0c08341af54ef342be0033133b5d088d891		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8936 10148 bytes

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