Malicious PDF — malware analysis report

Static analysis result for SHA-256 e101df0f9daa0f8c…

MALICIOUS

PDF

43.9 KB Created: 2020-08-31 08:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 611901fa4f1781c3c41263d7217bd170 SHA-1: ffa3f57daeda17184e8a1d687719938cc745162e SHA-256: e101df0f9daa0f8c124c06a1be642213b307c5157ba6f4b0da09fe91b3365cac
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying a link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'how to restore skyrim to vanilla' and the authoring application 'wkhtmltopdf', suggesting a lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a potential SEO poisoning or link farm strategy to distribute malicious content.

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/wix?keyword=how+to+restore+skyrim+to+vanilla
    • https://cdn.shopify.com/s/files/1/0434/5384/1560/files/64666950916.pdf
    • https://cdn.shopify.com/s/files/1/0431/3438/6332/files/bejazezipuranufegabo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/11582615847.pdf
    • https://cdn.shopify.com/s/files/1/0430/8231/7991/files/year_end_summary_report.pdf
    • https://cdn.shopify.com/s/files/1/0447/6744/5141/files/kibafolezigativijaluzi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5687/3128/files/tukededeziwiwajujesawoli.pdf
    • https://cdn.shopify.com/s/files/1/0431/8301/4048/files/evento_vascular_cerebral_hemorragico.pdf
    • https://cdn.shopify.com/s/files/1/0434/0681/9477/files/vezazuwenif.pdf
    • https://cdn.shopify.com/s/files/1/0450/4210/6518/files/remnant_from_the_ashes_cheat_engine.pdf
    • https://cdn.shopify.com/s/files/1/0432/8433/2710/files/etymology_dictionary_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/9679/1456/files/engineering_workshop_carpentry_practice_tools.pdf
    • https://cdn.shopify.com/s/files/1/0435/3402/4855/files/bmj_case_report_consent_form_template.pdf
    • https://static.usrfiles.com/ugd/30e015_92ff130e9c174999a6a97322c80421f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_b4a0729e245046edae04b76f9e289909.pdf
    • https://static.usrfiles.com/ugd/9e53d4_2622286b313940b68add66a25e6e137d.pdf
    • https://static.usrfiles.com/ugd/1a89c8_544412aa7e0b4791ba4aaedbb08bf6fe.pdf
    • https://static.usrfiles.com/ugd/77d535_6dea7581b8674e1d952def915d5f1c3a.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_off00006729.bin
8fe7818cbafab320e8fa11a8c25cee84fa7439412ee099d5e7612c900e4d6110
pdf-font-stream PDF embedded font (sfnt) at offset 0x6729 5108 bytes
font_01_sfnt_off0000788c.bin
4a8252c4c732a035c22ae6810ab211e04a3ee7a07be3a2329bef7713794160c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x788C 13280 bytes