Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ef1b16a2967d066…

MALICIOUS

PDF

97.2 KB Created: 2020-09-01 22:13:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3db80109ed0209775b30247387fc006 SHA-1: dead7103e344431093e35a4a335e7286d893765f SHA-256: 8ef1b16a2967d06605e9f613d355801df02ebb55606d2de39cffbcc417e66d87
152 Risk Score

Malware Insights

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

This PDF file contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lure the user into clicking on the link. The document body contains a fabricated news headline about a reporter's death, likely to entice clicks. The ML classifier also flagged this PDF with high confidence.

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=60+minutes+reporter+killed+in+car+accident
    • https://static.usrfiles.com/ugd/6f7357_b03bc2925a25405ca00e60eaffb778af.pdf
    • https://static.usrfiles.com/ugd/22bf55_a082d2ff4d474c58bd486ca1f9e05e41.pdf
    • https://static.usrfiles.com/ugd/9e41f0_5962b25f426443389a92d1e5e5cc72eb.pdf
    • https://static.usrfiles.com/ugd/18f527_22322106406241b7be6c7f300a1bd9f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_74a5ce99115d458bb9fffb5bc40a766f.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd747435b33343c48ba00d9f70897bde.pdf
    • https://static.usrfiles.com/ugd/37321e_daf1cec7fbee421182e100ce0e93ab49.pdf
    • https://static.usrfiles.com/ugd/097bd5_f1e2470e56e94d64b992dda4db4514c1.pdf
    • https://static.usrfiles.com/ugd/36f25b_8c61ce17a1424d92872b429a4e95bba2.pdf
    • https://cdn.shopify.com/s/files/1/0431/8514/3969/files/65413685713.pdf
    • https://cdn.shopify.com/s/files/1/0434/4784/5030/files/aziz_ansari_modern_romance_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/78682872407.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_off00013679.bin
e953e8d9df0a87ca86b27365b0c41349aa323de335a951d3da71337d3dc7414e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13679 5484 bytes
font_01_sfnt_off00014903.bin
bee082bef545bfffdde3b33ea5ac2264a65c22dd8f568e30f67f04ca727f275f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14903 14656 bytes

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