Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1aa6698a18e4ed…

MALICIOUS

PDF

43.7 KB Created: 2020-08-30 18:32:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0593b6fb1df9f969f69fb6ded152027d SHA-1: fd57060d8a0bbd5fe464d43eb2f26944277a69d1 SHA-256: bf1aa6698a18e4ede034cf90c098f273178b95dadfd3dbbd8b6800d39008d6bb
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised with keywords relevant to popular movie searches. The heuristic firings confirm the presence of a malicious redirector and a link farm, indicating an attempt to drive traffic to potentially harmful sites. The document body, though heavily obfuscated, contains the same lure and URLs found in the heuristics.

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=latest+movies++hd+tamil
    • https://static.usrfiles.com/ugd/b8c837_432cfe9ff0eb48fca92d68034e3bf6a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc3a4bf614a94e6e851c34e062a6ec3f.pdf
    • https://static.usrfiles.com/ugd/b8c837_ced26418bf654af0bbf015a9f023ecf3.pdf
    • https://static.usrfiles.com/ugd/e643da_f15b66fbcf884562b9180944d4630d80.pdf
    • https://static.usrfiles.com/ugd/b8c837_746d4a949d6e427fb7b7721d2a08138d.pdf
    • https://static.usrfiles.com/ugd/a76634_dc49712a30d3450fb1e5d932e61f6b28.pdf
    • https://static.usrfiles.com/ugd/b8c837_2feb2f00adbc4d52b2ca40b7817f0849.pdf
    • https://static.usrfiles.com/ugd/f515ca_ab908f33aabd42bda425d2bdd40378d2.pdf
    • https://static.usrfiles.com/ugd/ed64d2_be45df7442d24f11a840c8a1655133c2.pdf
    • https://static.usrfiles.com/ugd/af0aa9_1cbf08b643d1438b8141e5313d3a5fd4.pdf
    • https://cdn.shopify.com/s/files/1/0429/2375/3635/files/xewunu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1559/files/85667050265.pdf
    • https://cdn.shopify.com/s/files/1/0429/9620/3679/files/autocad_inventor_2020_tutorial.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_off00006fcc.bin
d6a0fadefb59404d417ba6558ca8c2ed2464b218b1517e8845fdc9240d13426a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCC 4968 bytes
font_01_sfnt_off00008099.bin
c993c2bb1e74277f417e1ec420b734dc8e3120dbf3bb8b32693c23179f8377e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8099 10000 bytes

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