Malicious PDF — malware analysis report

Static analysis result for SHA-256 24292c8467230642…

MALICIOUS

PDF

44.5 KB Created: 2020-09-20 04:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcf0064d5587f7ba0e6f907e748eea83 SHA-1: 0f2d062bf0c0058d1ec6cf383341c9f9cdf472d1 SHA-256: 24292c846723064250a91b017dd097b60c524f59287e07ad362635c2348a4d1b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/wix?keyword=avengers+endgame+download+offline'. This URL is presented within the document body, disguised as a download for popular media. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on cdn.shopify.com. The ML classifier strongly flags this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive link.

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.link/wix?keyword=avengers+endgame+download+offline
    • https://cdn.shopify.com/s/files/1/0435/9186/0379/files/39832251406.pdf
    • https://cdn.shopify.com/s/files/1/0479/4843/1527/files/spanish_1_midterm_exam_answers_edgenuity.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/sopifuvezutakurolemawa.pdf
    • https://cdn.shopify.com/s/files/1/0429/7841/0655/files/nitojuzikibekikovamuruvud.pdf
    • https://cdn.shopify.com/s/files/1/0429/9515/5105/files/hercules_2014_cast.pdf
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/bluetooth_4._0_pc.pdf
    • https://cdn.shopify.com/s/files/1/0440/6057/3846/files/aiag_core_tools_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0435/3346/7807/files/tujumokakimuguxobewum.pdf
    • https://cdn.shopify.com/s/files/1/0437/6304/0408/files/34496631287.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7104/files/target_flannelette_sheets_queen_size.pdf
    • https://cdn.shopify.com/s/files/1/0462/6441/8461/files/5371659172.pdf
    • https://cdn.shopify.com/s/files/1/0439/9503/7854/files/black_mirror_chute_libre.pdf
    • https://b69d72df-4c90-4ebe-879d-0f9d0e6f3016.filesusr.com/ugd/271e65_a7cee73cba51488ca8e94524f0ed71a0.pdf?index=true
    • https://08b26ae0-68b1-44db-b37c-d26aa3b0da74.filesusr.com/ugd/0b46e6_3f6f461b58864cb9bd444975bf40c379.pdf?index=true
    • https://0169a2bd-3333-4d36-be1f-f8e2b7916ada.filesusr.com/ugd/b5472a_cea90a8a2d794953b223fe46a5dec83d.pdf?index=true
    • https://c29553ba-7eae-4f13-8801-811609bcf9ff.filesusr.com/ugd/b11f6d_123500dcd39c47c1ae0aed34f3d169e7.pdf?index=true
    • 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_off0000622a.bin
71dd00de692fdc153689c36a56edc280859a82f590fda67cf62f9f24d4b6da51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x622A 5076 bytes
font_01_sfnt_off0000735f.bin
e87fe2bfa6213be7c047a9ac4540eddba7fe1c1c317cde4865140fefacfd0628		 pdf-font-stream PDF embedded font (sfnt) at offset 0x735F 10408 bytes
font_02_sfnt_off00009716.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9716 4324 bytes

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