Malicious PDF — malware analysis report

Static analysis result for SHA-256 29cbd8ea95ee6e5a…

MALICIOUS

PDF

45.9 KB Created: 2020-08-31 06:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29280a2aea2cd092ad474d1959eb1eb6 SHA-1: 3c2d86b7cf0fd8adbce1f4cfb145dadf98016874 SHA-256: 29cbd8ea95ee6e5a88f72d812ae34a9966259b9cc5c855b540153ee0b197271d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, one of which, 'https://ttraff.me/wix?keyword=tulip+fever+putlockers', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and references 'Tulip fever putlockers', suggesting a lure to malicious content. The presence of numerous other PDF links, many pointing to static.usrfiles.com, indicates a link farm strategy. The ML classifier strongly supports the malicious nature of this PDF.

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=tulip+fever+putlockers
    • https://static.usrfiles.com/ugd/4ae4db_c1d6df2888a9493fa148ad72acef73df.pdf
    • https://static.usrfiles.com/ugd/b8c837_d09ffebd3a0548338f097d7359f8c037.pdf
    • https://static.usrfiles.com/ugd/1be480_0da0a08b764744efabbb46390e0649aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_d848dcfe411946d194bb6a3471ffe9de.pdf
    • https://static.usrfiles.com/ugd/9b33c5_d8c5a036b7424429b630f27fca44d47c.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0df0ede68d24257857ef5e4911b38e9.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/gta_v_money_cheats_ps4_story_mode.pdf
    • https://cdn.shopify.com/s/files/1/0446/4400/8099/files/zexobazavezut.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/83168043657.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/19691151308.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_off00004b8d.bin
d59af509516acdca8aea1f786a777cef2bdcd5fa500888ed3b54519a1b14df71
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B8D 4872 bytes
font_01_sfnt_off00005c39.bin
7c04bd7deeb11cdf7478c5ef593735c7fc22ac6759f279761b1d90d503580837
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C39 1956 bytes
font_02_sfnt_off0000655d.bin
598e503b1c3363bd187b1e9507906b85a22c7570e987f859da1469e618b3835f
pdf-font-stream PDF embedded font (sfnt) at offset 0x655D 13240 bytes
font_03_sfnt_off00008eb2.bin
eed77c6c92f6a3d4c5dcb0672605cfd74e948f502d4a69c637a53ad7a9f63c2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB2 17912 bytes