Malicious PDF — malware analysis report

Static analysis result for SHA-256 a92f3cb2fbf3d678…

MALICIOUS

PDF

37.8 KB Created: 2020-09-01 01:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a57c5fd6bffea92f430ad9ea244c2bb6 SHA-1: 535ce1fe33280adfb547b4377142448c624c4fc3 SHA-256: a92f3cb2fbf3d678051ef6ca30ddb4deac1e0306535b25fe1bc5c2550ad514fa
150 Risk Score

Malware Insights

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

This PDF file contains a mass external link farm, with multiple links pointing to Shopify domains and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Telugu movies free moviezwap' and the malicious redirector URL, suggesting a lure to drive traffic to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=telugu+movies+free++moviezwap
    • https://cdn.shopify.com/s/files/1/0432/2613/6731/files/xuzudojuforugixovig.pdf
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/bolarevapugutesut.pdf
    • https://cdn.shopify.com/s/files/1/0440/6876/5861/files/total_conquest_mod_rexdl.pdf
    • https://cdn.shopify.com/s/files/1/0432/2466/2173/files/mubexutom.pdf
    • https://cdn.shopify.com/s/files/1/0431/0633/6930/files/workplace_safety_inspection_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/4371/7274/files/cauda_equina_syndrome.pdf
    • https://cdn.shopify.com/s/files/1/0434/8575/7606/files/79556141895.pdf
    • https://cdn.shopify.com/s/files/1/0462/4544/5786/files/javascript_backtick_performance.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/kamok.pdf
    • https://static.usrfiles.com/ugd/b8c837_99708c189bd14f61846832929278c864.pdf
    • https://static.usrfiles.com/ugd/de02f3_87c52b0416b84929a70a1c2e90d06e4a.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_off00005627.bin
f06e03272e7cb128132ca8609688935df594e0395e110fd87ed083ed474110ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5627 5372 bytes
font_01_sfnt_off0000687e.bin
fd17fd4ad41cbf43182f868d5aa16fe7f6eaee3fb041cdcdec5343feee630fa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x687E 10012 bytes

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