Malicious PDF — malware analysis report

Static analysis result for SHA-256 20cfe01b36002653…

MALICIOUS

PDF

34.6 KB Created: 2020-08-29 05:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 337fcb24b2066479617015943698244b SHA-1: 0dd8701a334dc4c5386488c47da9ec4850e18686 SHA-256: 20cfe01b36002653a0a9383d00de0d94f1b9f13a1a2e2635a35e92a9280a94ba
152 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is ttraff.com, which is likely used to redirect users to further malicious content. No scripts were extracted, but the PDF structure itself is designed to host and distribute links.

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=j%2525C3%2525A9sus+le+christ+lumi%2525C3%2525A8re+int%2525C3%2525A9rieure+partition
    • https://static.usrfiles.com/ugd/b8c837_dca6ca4fdd294ad1afac36aad4b7c27e.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ae687dded894163a8793a6b9aac9a69.pdf
    • https://static.usrfiles.com/ugd/b8c837_893d72eb114d4d849105a7c9b5dcabce.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e95fec18a414b6698e1d9e79c1d23d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a988c4a4caa4cfc925df0dacb8e53b4.pdf
    • https://static.usrfiles.com/ugd/b8c837_05c48aadc00045f3a10cb15d4f2c7443.pdf
    • https://static.usrfiles.com/ugd/b8c837_30e52e76c26a4a27a458c873ae60bbbf.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad5c5d54f2be471a94e0c221cdb78c6c.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e93d89840cf44078ef163bb9027c5bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_c0adad6502bf40ae8d924276af56824c.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8142de937284c0bae0337000f31f25a.pdf
    • https://static.usrfiles.com/ugd/b8c837_497dc99242c144dbba8b873bab2c1a97.pdf
    • https://cdn.shopify.com/s/files/1/0437/1247/9382/files/31723469254.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/90346135969.pdf
    • https://cdn.shopify.com/s/files/1/0440/3032/8997/files/vokamopumagopopiwu.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_off00004714.bin
16afa654ff537c891b513020f5303125467555d46aa4e7560d0cd0f12813acd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x4714 5448 bytes
font_01_sfnt_off000058d4.bin
4179f0873812c461ea0043d11508f15dd038d46a657c52e733b9fae72068e557
pdf-font-stream PDF embedded font (sfnt) at offset 0x58D4 10224 bytes