Malicious PDF — malware analysis report

Static analysis result for SHA-256 a364e1fb7f251835…

MALICIOUS

PDF

41.2 KB Created: 2020-08-10 19:37:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46c8edbb36532a7ba57c8b26df7039c7 SHA-1: c66ffb9ae5c0f1fd9fd91230019e6d0f012ba28f SHA-256: a364e1fb7f25183539e0a60cdc5c0ac9684a2972f8d91de0124126a176f13600
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=rational+numbers+examples+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are hosted on Shopify. The primary malicious link likely serves as a lure to redirect users to a phishing page or a malware download site. No scripts were extracted, limiting further analysis of the execution chain.

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=rational+numbers+examples+pdf
    • http://files.bikesandbuns.us/uploads/1/3/1/6/131636712/ac83ff528.pdf
    • http://rudonidim.love-your-mind.com/uploads/1/3/1/0/131070374/3195537.pdf
    • http://files.rtstringer.com/uploads/1/3/2/7/132741375/9efafd997d695.pdf
    • http://files.bearclawepic.com/uploads/1/3/2/6/132681356/16c3d11d130a.pdf
    • https://cdn.shopify.com/s/files/1/0431/8196/5474/files/pekugumo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/18105564263.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sividejujim.pdf
    • https://cdn.shopify.com/s/files/1/0434/6239/4008/files/coast_guard_correspondence_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/1179/2286/files/sidetakaza.pdf
    • https://cdn.shopify.com/s/files/1/0428/7676/4327/files/19106854571.pdf
    • https://cdn.shopify.com/s/files/1/0439/5089/9368/files/96702375077.pdf
    • https://cdn.shopify.com/s/files/1/0434/3690/0504/files/rogufexutipo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0439/files/portland_trail_blazers_schedule_2020_18.pdf
    • https://cdn.shopify.com/s/files/1/0430/1085/0979/files/54657837007.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_off00005fc8.bin
79bccadff2f3ea6230eae43370adbefae71a5a5c0f2aecb0e0685181f053c602		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC8 5404 bytes
font_01_sfnt_off00007210.bin
de510f57d0bac051ecf5ecf4d95eb2f519363ff441c42e984209bfe674f4e9df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7210 11672 bytes

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