Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ef334a45b3a0b66…

MALICIOUS

PDF

39.6 KB Created: 2020-08-30 03:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2970aadfac1aeebfa03d8c715f7acde2 SHA-1: 54331c3647389e111008bb55306991284860b69b SHA-256: 6ef334a45b3a0b66eaf64536562803a131769003231a290a81a79fcd1e21539f
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. This redirector, `https://ttraff.cc/wix?keyword=tor+browser+portable+github`, likely leads to a phishing page or malware download. The presence of numerous other PDF links suggests a link farm or SEO poisoning attempt to distribute 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.cc/wix?keyword=tor+browser+portable+github
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8570/2054/files/81903271998.pdf
    • https://cdn.shopify.com/s/files/1/0438/3509/7245/files/1846599635.pdf
    • https://cdn.shopify.com/s/files/1/0428/9904/6553/files/classification_of_non_alcoholic_beverages.pdf
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/3851628229.pdf
    • https://static.usrfiles.com/ugd/77eba6_f5d2bdf7854f4a1ea50915d010f41547.pdf
    • https://static.usrfiles.com/ugd/9219f8_5380ea2357f9443eb85f08c44cf7678a.pdf
    • https://cdn.shopify.com/s/files/1/0436/1093/1358/files/89749903866.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/11401128482.pdf
    • https://static.usrfiles.com/ugd/8de238_9d63af1e91bc40ee85534e16e90c4414.pdf
    • https://static.usrfiles.com/ugd/76de1a_7945a19fd8ee42d9b9486d2877582163.pdf
    • https://static.usrfiles.com/ugd/b8c837_f25449f8f3d245d2bead0c1867bef2d9.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_off00005a8d.bin
5b4bc2c8118601f5d1d9556a2b6aaffe001a54c2b5b723fe0338c2060f50725a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8D 5260 bytes
font_01_sfnt_off00006c77.bin
4ced83e95e7f5aea533928600f701356630cf953278b4d109f87fb39ed7e1cdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C77 10908 bytes

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