Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada8b43eee60b0ae…

MALICIOUS

PDF

34.8 KB Created: 2020-08-29 10:12:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 327189dfea6b286e874a9ae31fea27a4 SHA-1: d64396674e084a3305cc6135c5340d0a8459af9f SHA-256: ada8b43eee60b0aeb31e2d0cd0ef8be0f0588ec978fe4a29151954e6ea14df71
152 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.com' which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to watching 'monsters inc online', suggesting a lure to a fake streaming service. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, likely for SEO poisoning or to host further malicious content. No scripts were extracted, but the primary malicious activity appears to be the redirection to the 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.com/wix?keyword=watch+monsters+inc+online
    • https://static.usrfiles.com/ugd/b8c837_cbde0697eade453e89748eba8e4cc329.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ba8fa64ff2146f39c01d83a7ed68bbf.pdf
    • https://static.usrfiles.com/ugd/b8c837_5376b674dddb4ee6839607f6e6dd5dc8.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed62119cfa0342c2a416b4b9b0878903.pdf
    • https://static.usrfiles.com/ugd/b8c837_b78055f4d46e43aabdc759bd590ecc76.pdf
    • https://static.usrfiles.com/ugd/b8c837_6428d094ffd544ac8253c4fc7f9177d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a97b535424944388ee9c23b16124b08.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a5b497a97074dfe8b29730bc1c13340.pdf
    • https://cdn.shopify.com/s/files/1/0430/2707/1127/files/rusufiwanefuganileravixit.pdf
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/kimegugunoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/3262/4808/files/37986496430.pdf
    • https://cdn.shopify.com/s/files/1/0437/8191/4781/files/ww_wwe_brock_lesnar_photos.pdf
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/bejadapaziki.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_off00004bee.bin
e40b0c52c7794c94d2e61705fcab983ed6497a4a1aa471939d6bdb7e13c880fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BEE 5052 bytes
font_01_sfnt_off00005cf6.bin
be2798389372b4ecc53d34d7543ca580037919b20c006483d02d66d6df843b50
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF6 9840 bytes