Malicious PDF — malware analysis report

Static analysis result for SHA-256 f811fb438e316998…

MALICIOUS

PDF

37.5 KB Created: 2020-08-20 08:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92edec2e5eed329c6a6649d7a38f1c53 SHA-1: fd9944c2f8c7e66a3ad7988b6a02f5439dca67c8 SHA-256: f811fb438e3169989383524eff16092fefd4c6ecb54ccab5beebde384a2228b9
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a malicious redirector link. The primary malicious URL identified is ttraff.ru, which is used in conjunction with a keyword that appears to be a song title, suggesting a potential lure. The document body is heavily obfuscated but contains the same URLs, reinforcing the link farm and redirection attack pattern. The presence of numerous shopify.com links, while some are benign, contributes to the overall link farm characteristic.

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=gulzaar+chhaniwala+ijjat+song+video
    • http://files.theunitygardens.org/uploads/1/3/0/9/130969573/9f04517cf2a24.pdf
    • http://files.serendipitybathbody.com/uploads/1/3/2/6/132695551/074d9.pdf
    • https://cdn.shopify.com/s/files/1/0435/9290/8962/files/expresiones_coloquiales_en_ingles_americano.pdf
    • https://cdn.shopify.com/s/files/1/0431/7967/1718/files/fetarigosubivupejeta.pdf
    • https://cdn.shopify.com/s/files/1/0428/1935/4791/files/895823143.pdf
    • https://cdn.shopify.com/s/files/1/0429/2886/5446/files/95627367960.pdf
    • https://cdn.shopify.com/s/files/1/0431/7888/5280/files/45143318903.pdf
    • https://cdn.shopify.com/s/files/1/0432/6598/2632/files/91315196621.pdf
    • https://cdn.shopify.com/s/files/1/0435/5293/1995/files/98703945727.pdf
    • https://cdn.shopify.com/s/files/1/0433/9400/7191/files/67417777417.pdf
    • https://cdn.shopify.com/s/files/1/0434/2336/7335/files/kekozadafozab.pdf
    • https://cdn.shopify.com/s/files/1/0431/2200/0029/files/1122970508.pdf
    • https://cdn.shopify.com/s/files/1/0437/1070/9915/files/black_cat_in_japanese.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_off00004ae2.bin
494d6aac25624a85fb081183fa004beac23bef8fb975a5b5b5422398e5a37af4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AE2 5512 bytes
font_01_sfnt_off00005db9.bin
49d2f10837246388c8ad3dc62db47d6f3259b3c50d234c7c8e4a62be5d478ee5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB9 13676 bytes

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