Malicious PDF — malware analysis report

Static analysis result for SHA-256 82bb4fd0fa0f5d49…

MALICIOUS

PDF

47.3 KB Created: 2020-08-26 00:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67de9383b3979f8106be2ce66a8e8927 SHA-1: dd5c6ae7dec4a4d13e857daaec4071ddb0efee5d SHA-256: 82bb4fd0fa0f5d49e222d94116910713ea2e2162fa16934c9d88fca02dca5731
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector, ttraff.link, which is likely used to obscure the final malicious destination. The document body text, though partially corrupted, suggests a lure related to a "21 day brain detox steps pdf free do", indicating a potential phishing or scam attempt. No scripts were extracted from this sample.

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/pify?keyword=21+day+brain+detox+steps+pdf+free+do
    • http://favuga.buenasaludclub.org/uploads/1/3/2/7/132740873/d90e16.pdf
    • http://jilin.stephaneheaume.com/uploads/1/3/1/8/131857101/nopawukixigojor.pdf
    • http://gapofujuw.airbrushinggourds.com/uploads/1/3/0/8/130814328/931555.pdf
    • http://files.ideaingramhills.com/uploads/1/3/1/0/131070820/73907.pdf
    • https://cdn.shopify.com/s/files/1/0432/1116/1768/files/86627424807.pdf
    • https://cdn.shopify.com/s/files/1/0428/6929/3223/files/53386586383.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/dabokupomujuvukab.pdf
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/60459789074.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/58512913126.pdf
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/3_phase_automatic_voltage_regulator.pdf
    • https://cdn.shopify.com/s/files/1/0428/5025/5014/files/lowes_bristol_va.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/xagifeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97253363073.pdf
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/dujubopu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/classroom_language_flashcards.pdf
    • https://cdn.shopify.com/s/files/1/0434/5819/9719/files/10172231962.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_off0000790b.bin
35191aa074388c1b285a94e06e4ec849bceebd6358fb51af5175ed198b5d6733		 pdf-font-stream PDF embedded font (sfnt) at offset 0x790B 5404 bytes
font_01_sfnt_off00008b7f.bin
b4d869fb3eb90ba565c7927e80c81fb33ec274e38ccf719eb6e78860ec69457d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B7F 10644 bytes

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