Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8149660021dc323…

MALICIOUS

PDF

38.3 KB Created: 2020-08-22 12:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: befb6a879aca8f9bbdc31f5ba1b1a584 SHA-1: 60a0d002a4ef626480c24ff395d4a9c5b0d432dd SHA-256: a8149660021dc3237b5b027a0f5ca77157547be57461fa6cbcfeb706b67a0a6a
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=how+to+add+multiple+guides+in+photoshop', is designed to redirect users to potentially harmful content. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, likely for SEO manipulation or to obscure the malicious redirector.

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/pify?keyword=how+to+add+multiple+guides+in+photoshop
    • http://pagomori.lavenderlabel.com/uploads/1/3/0/7/130739204/ladamuxa_vedajupovo_zuxepiveze_rimaxexotisif.pdf
    • http://files.vztango.com/uploads/1/3/2/7/132712333/39ffc880cfc.pdf
    • https://cdn.shopify.com/s/files/1/0431/1462/7234/files/sukedibexopovigizes.pdf
    • https://cdn.shopify.com/s/files/1/0431/5653/7505/files/vapoxivazutumevonazuxopaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/2163/0631/files/sopefesewekazapikek.pdf
    • https://cdn.shopify.com/s/files/1/0437/0386/1416/files/44896185895.pdf
    • https://cdn.shopify.com/s/files/1/0433/3866/2053/files/38218894603.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/jizitigefamamerokav.pdf
    • https://cdn.shopify.com/s/files/1/0444/5736/1575/files/die_fabelhafte_welt_der_amelie_piano_noten.pdf
    • https://cdn.shopify.com/s/files/1/0438/5538/0630/files/sopenepabiwubafok.pdf
    • https://cdn.shopify.com/s/files/1/0433/1945/9998/files/how_to_reinstall_windows_store.pdf
    • https://cdn.shopify.com/s/files/1/0432/8062/9913/files/fibujofopugovelapifa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5190/0310/files/bike_race_3d_game_java.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/70214304275.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_off0000572b.bin
74a46b4c5b2a3bfc3c3af2186a28d4a7489886ade869758dcc226db5202e601d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x572B 5328 bytes
font_01_sfnt_off00006938.bin
21f8a10da25d81aa9023289a51fd32e21bd9d3c681d0d18c243713d648169f2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6938 10248 bytes

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