Malicious PDF — malware analysis report

Static analysis result for SHA-256 c022ef74b2b8122e…

MALICIOUS

PDF

38.9 KB Created: 2020-08-25 10:55:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c937fcd9ea6e8bc5cd510d6ef890950 SHA-1: 96362bae80a56b657727fb0fe5f035b02244310f SHA-256: c022ef74b2b8122e636e0e7faf0b599ec30f352665c8b4c1ad1434ab707a6a20
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.ru. The document body, though heavily obfuscated, contains the same URL and text suggesting it's a lure for 'pte academic reading practice test pdf'. The presence of a link farm heuristic further indicates a malicious intent to distribute links. 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.ru/pify?keyword=pte+academic+reading+practice+test+pdf
    • http://files.laurenmonteiro.com/uploads/1/3/2/6/132695306/dulatu-wofiz-jukufedolowela-pexowoka.pdf
    • http://files.crossfithermitage.com/uploads/1/3/2/3/132303170/jubasafalukigojupo.pdf
    • http://files.lorimerconsulting.co.uk/uploads/1/3/1/1/131164452/gupazoti-mamikepopo-letolebisilod.pdf
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/see_chegg_answers_free_2019.pdf
    • https://cdn.shopify.com/s/files/1/0454/1834/8712/files/nubuximiwoji.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/zawutotusaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/3489/3718/files/yamunashtak_in_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/fetuvazazapuge.pdf
    • https://cdn.shopify.com/s/files/1/0438/5662/5829/files/74037866530.pdf
    • https://cdn.shopify.com/s/files/1/0434/6570/3590/files/6857133099.pdf
    • https://cdn.shopify.com/s/files/1/0434/0311/6709/files/40381457163.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7429/files/harley_davidson_parts_manual_free.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_off00005b50.bin
7c3954a6dc7e1b1a4ed72476fd4f3d547d7f89427aaa33c0082ea249c5688193		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B50 5444 bytes
font_01_sfnt_off00006db6.bin
d113a4dbe14a308f827e970082268a1c21b40979e8554f71cbb3cd1ed9e82b92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB6 9708 bytes

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