Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab52962b4ed5e6aa…

MALICIOUS

PDF

37.7 KB Created: 2020-08-31 08:37:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3f9f423e5503c8a0d4fec16cb4c9ffe SHA-1: 4c275cb6cd350e38188e2c2c708d88255801b258 SHA-256: ab52962b4ed5e6aabc7ae2654f75aa697cee306cbe34fb5ea2fa0cd5f6c2e462
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in Systems T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is a strong indicator of malicious intent. The document also features a large number of external PDF links, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector URL is sufficient to classify this as a malicious document likely used for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=fallout+4+robco+battlezone
    • https://static.usrfiles.com/ugd/b8c837_4bd0e40eb6e04721a88f651f4d4435b1.pdf
    • https://static.usrfiles.com/ugd/bfbc46_92412ac6221048659200dcb5a6b07cc2.pdf
    • https://static.usrfiles.com/ugd/b8c837_0509c4930e4f42fbb07dcd56a78f5ac6.pdf
    • https://cdn.shopify.com/s/files/1/0433/6523/6895/files/78215756225.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/rekotedenarazub.pdf
    • https://cdn.shopify.com/s/files/1/0433/4649/3591/files/skyforge_class_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/78413790770.pdf
    • https://cdn.shopify.com/s/files/1/0433/0048/7332/files/vurawapa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3403/3824/files/the_four_agreements_in_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4829/files/nami_waiver_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/tasaga.pdf
    • https://cdn.shopify.com/s/files/1/0431/7557/5709/files/zowobevinenaperudutebev.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_off00005759.bin
a92ab15ea823df4bc1a61615e3a72961b372294a46dccb58ab00b49a59bca1e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5759 4848 bytes
font_01_sfnt_off000067f1.bin
b40b9fec0ba20707381bd47eb6396e0c2eafa034a35b0b8364472b0f90b53ec3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F1 10068 bytes

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