Malicious PDF — malware analysis report

Static analysis result for SHA-256 176ed1130be8748b…

MALICIOUS

PDF

45.0 KB Created: 2020-09-12 12:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff6b4cf6906d5989556cb847a80c173f SHA-1: a6809c5c4252c9f53db199c9e25ac2f886d36637 SHA-256: 176ed1130be8748b51e12ddef5cceae6d82244a8853ff535599fc561df7827ef
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.club, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

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/pify?keyword=how+to+remove+source+bottleneck+in+informatica
    • http://files.rspfitness.com/uploads/1/3/2/6/132681201/9843275.pdf
    • http://files.hopeandloveministries.org/uploads/1/3/1/3/131380126/nubudonuvuga.pdf
    • http://files.nulfglobal.com/uploads/1/3/2/7/132740836/wekuwadoxizav-tivuwu-lulurumiwak-kafowux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b5aed9_3c427963f18841658f4c384656a1e0d6.pdf
    • https://static.usrfiles.com/ugd/e2b09b_79fb6f600d0b4ac6a6959ef2440228c1.pdf
    • https://static.usrfiles.com/ugd/694d5d_43a82b8288b649129f509373788df74e.pdf
    • https://static.usrfiles.com/ugd/35c6e2_4abd0aadef364715bf716c8baa842484.pdf
    • https://static.usrfiles.com/ugd/cf5aa9_ba46a7c0a2cd41d9b467fc048dc4fcfa.pdf
    • https://static.usrfiles.com/ugd/35ddae_0c9d14eabd6d4008979163ae2b3ae668.pdf
    • https://static.usrfiles.com/ugd/69695d_7bf6f4483ab640edb56b76b011f9e235.pdf
    • https://static.usrfiles.com/ugd/4c3d6a_5af534f7f26c414b9ea81e4171abfbf0.pdf
    • https://static.usrfiles.com/ugd/bc4951_967b85e236314cb992fae6f53e86bc97.pdf
    • https://static.usrfiles.com/ugd/85c99c_00368901da334d6497877c1651912395.pdf
    • https://static.usrfiles.com/ugd/4dd980_151787f7c6384e6aa06ada892df87b46.pdf
    • https://static.usrfiles.com/ugd/1decf9_9e61f2ab43c04fe5bd037dd7b504d7c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_632afd7eaebb437c8f9953f389c6ef76.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071af.bin
8de26b214d96b10d5cfaaa7fafd90beb7e4d00edf56841d44886a8e77d12b73f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71AF 5344 bytes
font_01_sfnt_off000083de.bin
f9a077537fe20898307bf7f555b9ecc81d3b28cc2a5a20cb0c8e0335b5f197a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83DE 10200 bytes

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