Malicious PDF — malware analysis report

Static analysis result for SHA-256 10dd95e999ce10bb…

MALICIOUS

PDF

43.4 KB Created: 2020-08-29 19:55:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f469b3b9497078c714a991a9924ff54d SHA-1: 9d5240e5ee607a85fbc9c873e8de4b8c03b96810 SHA-256: 10dd95e999ce10bb3d4c16fb45633973b0c68400846f7de458a5a7ed587706a2
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for the malicious URL. The presence of many external links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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.ru/wix?keyword=western+civilization+volume+2+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b4a829_5746f673a1784fbc9cfd348d805caa36.pdf
    • https://static.usrfiles.com/ugd/80c1db_0a08c2f2a142461cb5c3be14f82e49d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_b4e4401e666840c294d854791d635bba.pdf
    • https://static.usrfiles.com/ugd/b8c837_04eb9e0fcc4344748837390be136e3eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_8dae3d00f91a43f580ee14e325e7d19c.pdf
    • https://static.usrfiles.com/ugd/b8c837_439bb322d2284741ae73232b0a5f10b2.pdf
    • https://cdn.shopify.com/s/files/1/0435/9494/0575/files/87276525872.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/official_badminton_rules.pdf
    • https://cdn.shopify.com/s/files/1/0437/3243/5093/files/pezibifofopumanojaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/depofegaduwosuzudabo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6835/7796/files/axolotl_francais.pdf
    • https://static.usrfiles.com/ugd/b8c837_87641118b5ca4eacba23843922907718.pdf
    • https://static.usrfiles.com/ugd/b8c837_362636c542d14cf99d234a49f50086fc.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_005a5b2e36df4d82a193ee9d858d8358.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e83.bin
378cdb8f55c348490ccfec22df4830c7260b00cbc6c1df8fd029cbee8446ad0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E83 5556 bytes
font_01_sfnt_off0000716f.bin
393d24a5986a809a69b9774df22a66b4bf1653f5019d2804e2a34a53cf53c9cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x716F 15204 bytes