Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2f898cb12790355…

MALICIOUS

PDF

40.1 KB Created: 2020-08-30 17:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 048d02c9038ff4646abbc472796cedca SHA-1: cf61a198dd2460b2daf15b2265fc033edbeacc61 SHA-256: a2f898cb12790355d2690ca2c48b9d88ad93c28bb5ce39a5d4dbff1f66ff99a2
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a link farm designed to host SEO-optimized PDFs. One of the primary links directs to a known malicious redirector, indicating a phishing or malicious content delivery attempt. The document body, though heavily obfuscated, contains the malicious URL and references to PDF content, reinforcing the lure.

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.com/wix?keyword=provincializing+europe+pdf
    • https://static.usrfiles.com/ugd/3b47cb_a2600982a63346659d38b5365455a84e.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b4014c6baa24e85b730d37e90d6527e.pdf
    • https://static.usrfiles.com/ugd/451a43_8dfafac226ff4739813dbc3817add768.pdf
    • https://cdn.shopify.com/s/files/1/0434/7451/8180/files/53339846909.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2922/files/zorakajiwawodekakivatez.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/calendario_mayo_2020_chile.pdf
    • https://cdn.shopify.com/s/files/1/0433/9335/1843/files/893262687.pdf
    • https://static.usrfiles.com/ugd/b8c837_d160ce30a08f43b8a5703c44dd9143de.pdf
    • https://static.usrfiles.com/ugd/b0b521_4ca8ebf0a7b749299c3a9d27155b628e.pdf
    • https://static.usrfiles.com/ugd/e3c460_0ef0e0ab273342bc83df6a9b7723df77.pdf
    • https://cdn.shopify.com/s/files/1/0450/4230/3140/files/switzerland_rail_map.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/bleacher_report_raw_live.pdf
    • https://cdn.shopify.com/s/files/1/0440/1286/3638/files/tikezudafobo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/20434028557.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_off000060e2.bin
645475cec0b1488a50b247ddb3f6ba23a54195e7621baf5ed891205e4b675be2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E2 5256 bytes
font_01_sfnt_off000072d1.bin
8a629c9646d04dfd1f160f64a2edae86f26ff1f2b3cbec84dd92a097d8d42a1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D1 9724 bytes

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