Malicious PDF — malware analysis report

Static analysis result for SHA-256 a269a55dbf3a317b…

MALICIOUS

PDF

44.5 KB Created: 2020-08-09 01:31:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53469967eaa22f438a457bdf506596f6 SHA-1: 4694b5d98e36cf8a3bd726557298480f7e74150a SHA-256: a269a55dbf3a317b1d3e886306d9f9cacf81470625dd56cb43ab2b78200ad655
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm or redirection scheme. The primary malicious URL identified is https://ttraff.com/pify?keyword=affinities+of+protochordates+pdf, which likely serves as a gateway to further malicious content. No scripts were extracted from this sample.

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/pify?keyword=affinities+of+protochordates+pdf
    • http://files.toddclardy.com/uploads/1/3/0/7/130776724/9155107.pdf
    • http://files.kingsporthorses.com/uploads/1/3/1/3/131383553/1742861.pdf
    • http://ketumaloz.gods-acres.com/uploads/1/3/1/4/131452883/vipasitesese.pdf
    • http://files.huntersvillelawyer.com/uploads/1/3/1/8/131871994/60fb12e78ede9.pdf
    • https://cdn.shopify.com/s/files/1/0431/3874/4476/files/69452135668.pdf
    • https://cdn.shopify.com/s/files/1/0436/9298/2427/files/27538621711.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0791/files/22018918058.pdf
    • https://cdn.shopify.com/s/files/1/0432/6142/7867/files/10886811794.pdf
    • https://cdn.shopify.com/s/files/1/0436/2308/8290/files/91019213910.pdf
    • https://cdn.shopify.com/s/files/1/0440/7522/1157/files/marathi_books_online_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/5816/5925/files/senesupekeleji.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4498/files/41000356116.pdf
    • https://cdn.shopify.com/s/files/1/0436/0096/9890/files/angielski_od_podstaw_dla_dzieci.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/jelexesudarenosutipobobu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/amadeus_selling_platform_connect.pdf
    • https://cdn.shopify.com/s/files/1/0431/7030/0065/files/cba_meaning_text.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_off00006bdc.bin
d9881ba8eb7d73b6026d6d3b7a38727b793c66159bdb18af651a564a4eb3701c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDC 5200 bytes
font_01_sfnt_off00007d8f.bin
b8cdb32bcd6b33bdeb70b279adf879bef14d39b51e1c8b75a312bfb29f5c9a59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8F 12480 bytes

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