Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3f989911bf86b46…

MALICIOUS

PDF

40.4 KB Created: 2020-09-01 22:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c864dc245216b7afbda8aee2acb4123 SHA-1: 3ae71c0e948c0a3b87f1452d8e711cc6807a1928 SHA-256: c3f989911bf86b46a792f71ab7500deac867aad4ad044258a03799a640e1e7df
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to direct users to malicious sites. One of the primary links, 'https://ttraff.ru/pify?keyword=free+golf+solitaire++windows+7', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'free golf solitaire windows 7', reinforcing the lure. The presence of a malicious redirector link indicates an attempt to lead the user to a compromised or malicious website.

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/pify?keyword=free+golf+solitaire++windows+7
    • https://cdn.shopify.com/s/files/1/0432/6775/2099/files/pifopozukif.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/35797829859.pdf
    • https://cdn.shopify.com/s/files/1/0428/7420/8415/files/cattell_16_pf_test_manual.pdf
    • https://static.usrfiles.com/ugd/0511f5_075e8a9b25bf4a649608b7aae6793518.pdf
    • https://static.usrfiles.com/ugd/b8c837_2baf3123d5914fa188f56659c9d14a21.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a68b588fcee4f509b10402ac94df59f.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_be816b6d63bd490e9f66d03248e1685e.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/86526592296.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/69879760880.pdf
    • https://cdn.shopify.com/s/files/1/0437/7011/8306/files/34636612938.pdf
    • https://cdn.shopify.com/s/files/1/0437/7896/5656/files/keravomifijabonuvu.pdf
    • https://cdn.shopify.com/s/files/1/0461/9993/1030/files/20728024627.pdf
    • https://static.usrfiles.com/ugd/4dd980_e639df33d5774b3facee5cdbd4dfeeaa.pdf
    • https://static.usrfiles.com/ugd/0dd040_5d2496f6899f48c59b5ca2ed2f8227b5.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_off00005ff8.bin
29c1548bdb45119381f5783c1427d850a78ae5770384f58599f469d555f112c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF8 5200 bytes
font_01_sfnt_off000071df.bin
480ef3fe79bd098123646beec71679ba813ce15b4ab6a0e2e05f23a080e1274e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71DF 10328 bytes

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