Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fc2d0f40ce749d8…

MALICIOUS

PDF

45.4 KB Created: 2020-09-01 11:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad119f8d322516ccb212a11eeb5eebf4 SHA-1: 828444df4f467ad595e7cc89fbc4bd4d9d520e7d SHA-256: 4fc2d0f40ce749d85755ab4910994e3f112b85930dc03e50f3f7f637ff7f9843
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. This indicates the document's primary purpose is to redirect users to a potentially harmful external site. The presence of numerous other links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to obscure the malicious destination. No scripts were extracted, and the document body is heavily obfuscated, but the malicious redirector is a clear indicator of malicious intent.

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.com/wix?keyword=gopale+ki+goti+borgeet
    • https://cdn.shopify.com/s/files/1/0436/5382/4677/files/59799207510.pdf
    • https://cdn.shopify.com/s/files/1/0436/7895/7718/files/briggs_and_stratton_service_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3585/files/fubudawozevavowedopaw.pdf
    • https://cdn.shopify.com/s/files/1/0447/8894/0961/files/33097461659.pdf
    • https://cdn.shopify.com/s/files/1/0432/2328/5928/files/29773465823.pdf
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/ikr_meaning_in_text.pdf
    • https://cdn.shopify.com/s/files/1/0431/2730/8454/files/have_been_vs_have_gone.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/veverutefofizewisorejetek.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/mubaxutijakilaminajekog.pdf
    • https://cdn.shopify.com/s/files/1/0430/8900/2645/files/nofomivoxizadozepusupawu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5165/5076/files/vezosafi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5326/8642/files/89699095849.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/sosimasalinazekudin.pdf
    • https://cdn.shopify.com/s/files/1/0434/5665/9621/files/zelabufudavino.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/airplane_flight_simulator_2017_hack_apk.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/13563284634.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005160.bin
4a83160d2537064efd46450a72cebd603346d6f784674184a9f4d9a06b785965		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5160 4728 bytes
font_01_sfnt_off00006186.bin
23c658b1fb3ec8da757a65c1235067837415e525ed51e0a3e096f75369afa619		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6186 3720 bytes
font_02_sfnt_off00006cf0.bin
e3231c5494e698fbc0da88c8d37a6a9b4722a89042473fba585b4317efd05626		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF0 14344 bytes
font_03_sfnt_off00009a65.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A65 4324 bytes

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