Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c1530f4f3393f8…

MALICIOUS

PDF

40.8 KB Created: 2020-08-31 23:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4295c538be3817915f08786220f7f2fe SHA-1: 68531727b253a6b333c215740606aa58e843d2e5 SHA-256: 95c1530f4f3393f8c9547862a77a0bbf353fe89ccbaa5ffeb1ff8e6f7b0af703
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a link farm designed to redirect users. One prominent URL, 'https://ttraff.com/wix?keyword=resident+evil+4+biohazard+game+for+android', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a tactic to disguise malicious activity within a large number of seemingly benign links. The presence of a malicious redirector indicates an attempt to lead the user to a harmful destination.

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=resident+evil+4+biohazard+game+for+android
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/chemistry_formula_book_for_neet.pdf
    • https://cdn.shopify.com/s/files/1/0456/8471/9775/files/zigadovogas.pdf
    • https://cdn.shopify.com/s/files/1/0438/4486/2114/files/mis_sentimientos_erroneos_silvia_olmedo_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mejamuzeditika.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0309/files/dategalifi.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc15fbd2af7f40538e429bed6b43baaa.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5275f14275f4be9b28eedb7b2fde6de.pdf
    • https://static.usrfiles.com/ugd/87d215_e5fa72cdbe9846719aff1cc45352094a.pdf
    • https://static.usrfiles.com/ugd/c7ef1a_c1158f17348a442a8f5a0f5611ea75b6.pdf
    • https://static.usrfiles.com/ugd/1e32c2_0a5f5aadf67441f3a3536b8ec980535b.pdf
    • https://cdn.shopify.com/s/files/1/0430/1357/0709/files/tijasapadojem.pdf
    • https://cdn.shopify.com/s/files/1/0444/3671/7735/files/wufitopi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9324/4570/files/witcher_3_hook_matches_count_check_error.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2292/files/21879361950.pdf
    • https://cdn.shopify.com/s/files/1/0437/3846/4405/files/kalender_2020_weeknummers.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_off00006129.bin
c230027ee53b744b81ee4bc5ecf61a42402fd148a45240336a9e582dca3e640e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6129 5664 bytes
font_01_sfnt_off0000745a.bin
57c8a29b2617538fe52885f72a98b7efcd349d83b36e0e69ad6d869b923451cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x745A 9980 bytes

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