Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd3384976e60b4c7…

MALICIOUS

PDF

41.3 KB Created: 2020-09-04 12:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 338ed272583557a08551067069477e12 SHA-1: f9e1dda6ffd5870117475774ccde5349296c84e7 SHA-256: cd3384976e60b4c706fb7c3b329dd327f2a0de3f7ac8b2a5616a2d1c37022dbf
152 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by a machine learning classifier and contains a link to a known malicious redirector. The document also exhibits characteristics of a PDF link farm, embedding numerous URLs that point to external PDF files, likely as a tactic to manipulate search engine results and distribute malicious content. The primary malicious URL identified is https://ttraff.club/wix?keyword=barcode+scanner+software+for+android+mobile.

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.club/wix?keyword=barcode+scanner+software+for+android+mobile
    • https://static.usrfiles.com/ugd/79e0dc_60692feeda514e7fb35bc32d31b8c14c.pdf
    • https://static.usrfiles.com/ugd/b9801a_9eb7e5205cf6427aa4bee10dd54c672f.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ead4e8c8306479ab4a774814528b582.pdf
    • https://static.usrfiles.com/ugd/b8c837_1fdf750a5d634e91aaa69aba65daef50.pdf
    • https://static.usrfiles.com/ugd/72216b_6cb4221e65b740eb8b13bdeb51e63898.pdf
    • https://static.usrfiles.com/ugd/dcfb95_8f361d8bb9ca4f33843a83fec21ca626.pdf
    • https://static.usrfiles.com/ugd/b8c837_070ce2bf6836403db4bed0a752beced0.pdf
    • https://static.usrfiles.com/ugd/9734e7_0fdbce4c117a4d4689c9d416363b76e9.pdf
    • https://static.usrfiles.com/ugd/aaaf79_a6e48f7552d14232ae182738c1a5bfc2.pdf
    • https://static.usrfiles.com/ugd/787b0a_6371f50ad1a74fca977277acef45f78e.pdf
    • https://static.usrfiles.com/ugd/dd4472_8bacfd7ceba74396a777dd1e72ba3fe3.pdf
    • https://static.usrfiles.com/ugd/3aee12_b6f3111145ce4a7490c3ae94b8b796ec.pdf
    • https://static.usrfiles.com/ugd/ed64d2_82dfaea7aeff4ac7b3bf069ba266df19.pdf
    • https://static.usrfiles.com/ugd/8cbfce_89fbb9014c024ae8aa5003a0b5a402e8.pdf
    • https://static.usrfiles.com/ugd/0582e0_dce61dad9cf441ea93a26b3627ff9d8e.pdf
    • https://static.usrfiles.com/ugd/de65f7_26fd95a5320d4a9fb9c7eeb7ea994176.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_off000061e1.bin
d6aa168b8cf342612388f2b1e990b164666ea4366fc81e69014e1f82a2905d07
pdf-font-stream PDF embedded font (sfnt) at offset 0x61E1 5448 bytes
font_01_sfnt_off00007462.bin
55ea0e6b874613c000a0c348f696510ea9eb984fe22e454bd981bb04db05a752
pdf-font-stream PDF embedded font (sfnt) at offset 0x7462 10524 bytes