Malicious PDF — malware analysis report

Static analysis result for SHA-256 a481d5202a53281f…

MALICIOUS

PDF

41.8 KB Created: 2020-08-28 12:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2806b6b7bb233afea5f33c650ef3aaa SHA-1: 20c969650a5e0e973bf93bdb75722fc5f44a7470 SHA-256: a481d5202a53281fe28daea00b25729b80c2fa6650356fb152ed3abd5584916d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=sno+jet+thunderjet+reproduction+parts', is designed to redirect users to malicious infrastructure. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, likely to manipulate search engine results or distribute further payloads. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=sno+jet+thunderjet+reproduction+parts
    • http://files.acsmonogramdesigns.com/uploads/1/3/1/3/131384335/xasizuv_bewulibubaz_koxiforuvu.pdf
    • http://files.mylegalvillage.com/uploads/1/3/1/4/131408581/dfe7d2c977d8.pdf
    • https://cdn.shopify.com/s/files/1/0436/8223/4521/files/carol_dweck.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7904/files/85049232920.pdf
    • https://cdn.shopify.com/s/files/1/0434/9440/8352/files/nasafisapafitupo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sitomomuwarusubewikujo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5415/3371/files/40938337576.pdf
    • https://cdn.shopify.com/s/files/1/0431/4310/2618/files/phonics_reading.pdf
    • https://cdn.shopify.com/s/files/1/0431/2878/3002/files/71540134443.pdf
    • https://cdn.shopify.com/s/files/1/0438/9961/7448/files/gopikumevoroxevuwut.pdf
    • https://cdn.shopify.com/s/files/1/0437/1585/4490/files/41644977554.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5302/files/tudifadajobozutuzalaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/5336/7975/files/68928898021.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_off00005795.bin
16d9e1e836c5243e3660acc3860c8981afdadf3e63fe23fc03301ded4dc97c88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5795 5308 bytes
font_01_sfnt_off00006995.bin
7ea43ad4661ee9d22b8fe16427c9c40c1984b9be23046e7427fe38f1d1d55d83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6995 15188 bytes

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