Malicious PDF — malware analysis report

Static analysis result for SHA-256 12592881073454f1…

MALICIOUS

PDF

42.6 KB Created: 2020-09-01 10:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60d8510ef80e15f204d6c8f228495a19 SHA-1: 95e5c635a58d9e9a1995559f230cac57dcac93dc SHA-256: 12592881073454f157734b148752acc27d77a0d7fa5deaaab032b93b2ee84fad
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains text that appears to be a lure for adult content, likely to entice clicks on the malicious link. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm or SEO manipulation tactic to obscure the primary malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/pify?keyword=all+actress+photo++hd
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102Hussain
    • http://smc.org.inhttp://smc.org.in
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/givusadadasot.pdf
    • https://cdn.shopify.com/s/files/1/0437/4442/8181/files/28454905525.pdf
    • https://cdn.shopify.com/s/files/1/0439/5817/3854/files/45505482553.pdf
    • https://cdn.shopify.com/s/files/1/0433/6215/6702/files/maths_aptitude_test_for_class_10.pdf
    • https://static.usrfiles.com/ugd/fafc38_96755a4d81f84cb1b0cc2a1751bd4a86.pdf
    • https://static.usrfiles.com/ugd/cf79db_bfbac7ed99414313810cb3a539d41e0c.pdf
    • https://static.usrfiles.com/ugd/b6edda_8d0a057894af47f8a75945b2c57bf5db.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tufajotojitumawudawemir.pdf
    • https://cdn.shopify.com/s/files/1/0434/8336/5528/files/63867560576.pdf
    • https://cdn.shopify.com/s/files/1/0435/0686/0187/files/42328577373.pdf
    • https://cdn.shopify.com/s/files/1/0430/8107/2789/files/singer_handy_stitch_manual.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/
    • http://scripts.sil.org/OFL
    • https://gitlab.com/smc/meera/blob/master/COPYING

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003fce.bin
9eb2222726108b9655678fa05dc152b267e26ed1814905d8e65987db611b51af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3FCE 4784 bytes
font_01_sfnt_off00005011.bin
1620336da6018abf771a3b64a4739dbc5cc5761e5bcfd31f9568e9163b5e6178		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5011 2656 bytes
font_02_sfnt_off00005b10.bin
e23308bb06bff427f4fe2d795198e016b2e9db23d45fd702446b15ef1a1323d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B10 3048 bytes
font_03_sfnt_off0000671b.bin
b3976ad28991401f3a7e0d936621f3963ed8fd81aff5bedc9e25cf6548b1959b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x671B 2108 bytes
font_04_sfnt_off000070f0.bin
0efa360cd1518d93cadbd7995271526e51f8adca1fcd54e2fe599da1f4001ed7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F0 8732 bytes
font_05_sfnt_off00008ebb.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EBB 4324 bytes

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