Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf0946b80315bd4…

MALICIOUS

PDF

42.2 KB Created: 2020-08-29 21:38:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2ac3680c425d4c67296bf250147f5f9 SHA-1: db71b3be7d19bcdbd1a4b99468c729993844f352 SHA-256: 9cf0946b80315bd47762a15f357ffef854d50921bfbc4703340ba0012ce9fa4d
152 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier as malicious. It contains a large number of external links, many of which point to a redirector service at 'ttraff.club'. This suggests a link farm or SEO poisoning attack, designed to lure users to malicious sites. The document body itself is heavily obfuscated and contains the primary malicious URL.

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=mentats+of+dune+pdf
    • https://static.usrfiles.com/ugd/e8506d_7cbe564b06c2469b960be947316ce317.pdf
    • https://static.usrfiles.com/ugd/b8c837_45d168df0d544de6a846328f3b998d86.pdf
    • https://static.usrfiles.com/ugd/bfbc46_3750f1f4f65048b0863929281e30f492.pdf
    • https://static.usrfiles.com/ugd/b8c837_2d69e7d67fab432a97d0fad4414a40cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e529965e6e147beb781697430368693.pdf
    • https://static.usrfiles.com/ugd/b8c837_5fc6c97f93bc4691a976cd63338b8b70.pdf
    • https://static.usrfiles.com/ugd/affaa6_cc329ec820a646b1832bd1917f006c18.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fb2fd4edc2844a7b26d68894e4b97a7.pdf
    • https://cdn.shopify.com/s/files/1/0431/1502/0448/files/possessivpronomen_bungen_a1.pdf
    • https://cdn.shopify.com/s/files/1/0428/7198/0198/files/minecraft_helicopter_mods.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/57645553189.pdf
    • https://cdn.shopify.com/s/files/1/0436/4910/6073/files/fafovumiwabagoke.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ba0899f1c3b4c5b88aad73add6155e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_c73477439cc14087a76c724466a4ec3f.pdf
    • https://static.usrfiles.com/ugd/4e6dd5_0dc5687e6ef640c5942caded095c5a3a.pdf
    • https://static.usrfiles.com/ugd/b65acf_d6f4ac254b1d48ab880b392fae708e16.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_off00006784.bin
4d91adb423d92d6da826409570b6ca4db696779aee5fb68b4e3a9d8b65cc4546
pdf-font-stream PDF embedded font (sfnt) at offset 0x6784 4912 bytes
font_01_sfnt_off0000785a.bin
0d5458aeb06d86ae0ca5c0109590cf558b51dd336ff3051434143ac069486dda
pdf-font-stream PDF embedded font (sfnt) at offset 0x785A 10572 bytes