Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c27ea335c7c86bf…

MALICIOUS

PDF

41.2 KB Created: 2020-08-21 02:20:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b18a8bb61404aee9b45dceee13ed334 SHA-1: e2abbe218fe7d4f7840b07c2b41f4c061b05da4e SHA-256: 3c27ea335c7c86bf77a9cd295420dceee2f0cbf2ebf023d7689fbfffd0cda5dc
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as a search result for sheet music. This indicates a likely attempt to lead the user to a site that will distribute further malware. The PDF also contains a large number of links to other PDFs hosted on Shopify, suggesting a link farm for SEO poisoning or to spread malicious content. No scripts were extracted, but the presence of a malicious redirector is a strong indicator of malicious intent.

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.cc/pify?keyword=allman+brothers+jessica+piano+sheet+music+free
    • http://files.sarahssweetwaffles.com/uploads/1/3/1/4/131437636/6adc8d20c4b.pdf
    • http://files.mcclainmatthewsinsurance.com/uploads/1/3/1/4/131409090/7232005.pdf
    • http://bubekek.rodsartgallery.com/uploads/1/3/0/8/130874063/032517a6.pdf
    • http://bekazo.enochpacheco.com/uploads/1/3/0/7/130776611/tuvesikip.pdf
    • http://files.paintrollersplus.net/uploads/1/3/1/4/131406892/7564200.pdf
    • https://cdn.shopify.com/s/files/1/0440/2266/1278/files/super_mario_bros_3_snes_rom.pdf
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/maginime.pdf
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/85298014234.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/itunes_for_linux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baxumedufimoval.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/tourner_dans_le_vide_english_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/4042/3592/files/lixawajukadumekovuzaro.pdf
    • https://cdn.shopify.com/s/files/1/0438/2290/7549/files/zilujosevok.pdf
    • https://cdn.shopify.com/s/files/1/0431/7223/3376/files/jozata.pdf
    • https://cdn.shopify.com/s/files/1/0448/9232/3995/files/quantitative_aptitude_topics_in_telugu.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_off0000511d.bin
2a8c4019df5340d17417cf80508c6610cc0a9952c7cb3ad4e048b2d6fd63208b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x511D 5460 bytes
font_01_sfnt_off0000637e.bin
925e28a98db990e8a3e1f3af3d45029161006c9fdb10dc7d9c81a1709de13291		 pdf-font-stream PDF embedded font (sfnt) at offset 0x637E 15860 bytes

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