Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f74574f77e83900…

MALICIOUS

PDF

47.7 KB Created: 2020-09-02 03:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab2a838859beddd898ff6215fbfc0517 SHA-1: 62844ebadbf2b5d71807724b55b94b61a1011b7f SHA-256: 2f74574f77e8390024bc1079907470cfe39ded4cf8e5da4740ed44ce6c8bda98
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=vlookup+google+sheets+multiple+tabs'. This URL is presented within the document body, suggesting a social engineering lure to trick users into clicking it. The presence of numerous other links to Shopify domains, while individually benign, contributes to a link farm pattern, likely for SEO manipulation or to obscure the malicious redirector. The ML classifier also 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/pify?keyword=vlookup+google+sheets+multiple+tabs
    • https://cdn.shopify.com/s/files/1/0439/7914/5374/files/hughes_hallett_calculus.pdf
    • https://cdn.shopify.com/s/files/1/0432/8115/4198/files/50872001636.pdf
    • https://cdn.shopify.com/s/files/1/0432/7384/6952/files/jufuwejezomikuzowosam.pdf
    • https://cdn.shopify.com/s/files/1/0429/8145/8069/files/tinajenulenutigulakefito.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1326/files/pumowovu.pdf
    • https://static.usrfiles.com/ugd/9421c8_a10d8bef092c4f36adc9c4a26b749ca6.pdf
    • https://static.usrfiles.com/ugd/289c5e_85bef35d8c7648f4a89273d9e3f96d71.pdf
    • https://static.usrfiles.com/ugd/dd4472_84dacefbd1d74d8fbe6e993b039fe930.pdf
    • https://static.usrfiles.com/ugd/cf14a4_313fe8085e1c427ca4610c5b8da1036b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8f020952f5347c7b22846d11bbcb7a0.pdf
    • https://cdn.shopify.com/s/files/1/0438/7418/9480/files/aminoacidos_quimica.pdf
    • https://cdn.shopify.com/s/files/1/0437/0202/6393/files/guzotekisalozow.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/nobididutobaxerosose.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zutowujovepenatugipo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/vapufavito.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_off0000778b.bin
a958874d7909a8bb7d9bc134205e2aa854c471addb3f94e3d4ece25c62fdc0fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x778B 5304 bytes
font_01_sfnt_off00008978.bin
44c2a2551df2d75f3ef2961e1fec9bb983283ec380396660737a27a90a4b0a31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8978 12380 bytes

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