Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9ac23ef2903267b…

MALICIOUS

PDF

65.9 KB Created: 2020-08-17 02:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3d156086e873c8010dc3faf584e6e40 SHA-1: deef5a01ad9d87b4e2c68392bba3a0a3c94ef279 SHA-256: f9ac23ef2903267b4158b21aed6f93f7ac0d05315e61a5c15ed67a5e127cf59f
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=crm+aviation+pdf', suggesting a lure to a malicious site. The presence of numerous Shopify-hosted PDF links indicates an attempt to obscure the malicious destination. No scripts were extracted from this sample.

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.cc/pify?keyword=crm+aviation+pdf
    • http://files.theyouthchallenge.com/uploads/1/3/2/3/132303010/vetixepe-rezosos-kobikegada.pdf
    • http://files.robynnpowell.com/uploads/1/3/1/1/131164048/dfc9780d65374.pdf
    • http://files.natashaparis.com/uploads/1/3/1/0/131070798/b7b61.pdf
    • http://zodoka.rainbowconception.com.au/uploads/1/3/1/6/131606490/dobeg_bubevanagan_benalu.pdf
    • https://cdn.shopify.com/s/files/1/0444/2842/7431/files/71691227604.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8674/files/55550372737.pdf
    • https://cdn.shopify.com/s/files/1/0435/2914/2426/files/nebomukinivaxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1394/7048/files/81729960393.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4340/files/marathi_audition_script.pdf
    • https://cdn.shopify.com/s/files/1/0435/3759/6575/files/98704542866.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.pdf
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/rapidex_english_speaking_course_kannada_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/3472/1959/files/block_spotify_ads_hosts_file.pdf
    • https://cdn.shopify.com/s/files/1/0434/3712/9895/files/escobar_designs_for_the_pluriverse.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b92d.bin
cd69dd22515692ac5ae77c9dd53f53fb583d1b0c9c5c1601a0911fe265fdeab3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB92D 4732 bytes
font_01_sfnt_off0000c924.bin
5c92cca5ea9b918891e76119a98eed4ff42f090a41401b1be5d4be0c7fb5ef7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC924 10496 bytes
font_02_sfnt_off0000ecfc.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECFC 4324 bytes

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