Malicious PDF — malware analysis report

Static analysis result for SHA-256 980e9b85a097efcf…

MALICIOUS

PDF

100.5 KB Created: 2020-09-13 13:49:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98109f9b4c323ec72c22cbc5d43d09dc SHA-1: 36f3a366e4aa392473f9fabc11dfee4e3f53f670 SHA-256: 980e9b85a097efcf12c26fc6fcb6976db1c742f77bc98359f4562b4965b48d99
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/wb?keyword=who%20plays%20liam%20in%2090210`. This URL is presented within the document body, disguised as a search result. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier 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.ru/wb?keyword=who%20plays%20liam%20in%2090210
    • https://cdn.shopify.com/s/files/1/0447/9359/4005/files/43566093089.pdf
    • https://cdn.shopify.com/s/files/1/0435/2121/2570/files/likert_scale_smiley_faces.pdf
    • https://cdn.shopify.com/s/files/1/0434/2723/3954/files/gujinoluga.pdf
    • https://cdn.shopify.com/s/files/1/0437/4636/1505/files/black_body_radiation_file.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/65344200330.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8711/files/pdf_to_word_converter_google.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lekefokatonerosabiwifeva.pdf
    • https://static.usrfiles.com/ugd/f241d9_d3ebf2dc99f242109212bd604b790aef.pdf
    • https://static.usrfiles.com/ugd/d954c5_c0bc4ab4d02c4b0eb3a59420d3a66a44.pdf
    • https://static.usrfiles.com/ugd/7be1cd_324d76c7e2f048dbb15e22bb169d75bc.pdf
    • https://static.usrfiles.com/ugd/e42ee3_86b18f0c360d4f09a2d586ac934a87bf.pdf
    • https://static.usrfiles.com/ugd/8c7d07_92265ffa7d5747f5b0f66b6d6f3a6563.pdf
    • https://static.usrfiles.com/ugd/b926a8_1c5f12dc5fe44c8bbca0ebfb6725b3cb.pdf
    • https://static.usrfiles.com/ugd/ab059d_6ff6c1784ac6495f857f4846b8643349.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d0a.bin
407684780b9f201fbfb1426624c25b22c324b21b3b94f2d716a2d2d16aa6df4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0A 5560 bytes
font_01_sfnt_off00013fe3.bin
43424b3c75c2a09229215823122f603636194bc90f89a1f6903998e123ca539e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FE3 15100 bytes
font_02_sfnt_off00016fd8.bin
46d9b83afd797048ab251ddfc9ca9a6db44f3280724c231f6a80a061bcc6fc12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16FD8 16120 bytes

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