Malicious PDF — malware analysis report

Static analysis result for SHA-256 462a46e711a4b2a7…

MALICIOUS

PDF

45.5 KB Created: 2020-09-02 05:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce0836bfd89c3182e8552f3c97cd8ee7 SHA-1: 5b340606ebc9ced34c9f77c9367f25a5199eb335 SHA-256: 462a46e711a4b2a7eff859980c7fb8a5e5abcc87265d067e5193b247652df2f4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=chappellet+mountain+cuvee+2016+tech+sheet'. This URL is likely used to redirect users to a malicious site for phishing or malware delivery. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to benign content but serve to obscure the malicious intent. The ML classifier strongly flagged this PDF as malicious.

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.cc/wix?keyword=chappellet+mountain+cuvee+2016+tech+sheet
    • https://static.usrfiles.com/ugd/fd3290_f21b6488bc9f44638e8e3ac2e53dc1f8.pdf
    • https://static.usrfiles.com/ugd/3eed2b_3d52b970a2164fe9bd9b6361470af3ba.pdf
    • https://static.usrfiles.com/ugd/217d68_d2e5cb0fbab1445eae653bbd2b956b70.pdf
    • https://static.usrfiles.com/ugd/3f80ec_5bb7ffc2a6b245298108cb728059843e.pdf
    • https://cdn.shopify.com/s/files/1/0437/3345/0903/files/adecco_malaysia_salary_guide_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/emma_holliday.pdf
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/votuvirumarosefezadinejal.pdf
    • https://cdn.shopify.com/s/files/1/0428/4186/6403/files/frostpunk_quick_start_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/0399/2485/files/ramon_ayala_torrent.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3cca861d73d4e9bb6428ff1c4cdf28d.pdf
    • https://static.usrfiles.com/ugd/9ec29b_e30f47248946420185aa3f6fec095180.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064d2.bin
1d170a3e1acc252e9f8eef628b304e0e3804ff4f9b27f46103470d1af4acbe19
pdf-font-stream PDF embedded font (sfnt) at offset 0x64D2 5520 bytes
font_01_sfnt_off0000778b.bin
2620ee697027e09d8a3d3ea7c02f41e4f3a401d100b15be6b086b3d1cce02433
pdf-font-stream PDF embedded font (sfnt) at offset 0x778B 10432 bytes
font_02_sfnt_off00009b2f.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B2F 4324 bytes