Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3621f3145a17c59…

MALICIOUS

PDF

53.2 KB Created: 2020-09-09 07:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e9b63c165ed0275e77fd5672d5f0c50 SHA-1: 352412f9741a7e250681ec318d01fb8fe9b56a28 SHA-256: f3621f3145a17c59797f15ee41789060df1fc1fcc1ccedf1dc2d1b00d6e83825
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDF files hosted on Shopify, a technique often used for SEO poisoning or to obscure malicious redirects. One of these links, 'https://ttraff.me/wix?keyword=charcot+midfoot+deformity', is flagged as a known malicious redirector. This suggests the document's primary purpose is to lure users to malicious infrastructure, likely for phishing or malware delivery.

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.me/wix?keyword=charcot+midfoot+deformity
    • https://cdn.shopify.com/s/files/1/0439/7950/5822/files/bollywood_new_song_site.pdf
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/alguma_poesia_carlos_drummond.pdf
    • https://cdn.shopify.com/s/files/1/0430/7389/6602/files/30122336958.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/10607246434.pdf
    • https://cdn.shopify.com/s/files/1/0448/4897/1938/files/online_text_editor_free_without_watermark.pdf
    • https://cdn.shopify.com/s/files/1/0432/7384/6952/files/fine_motor_skills_worksheets_cutting.pdf
    • https://cdn.shopify.com/s/files/1/0437/5399/6442/files/florida_new_hire_reporting_form.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9398/files/captain_america_1_1941.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/movugarikinodejexefil.pdf
    • https://cdn.shopify.com/s/files/1/0463/5289/2061/files/98730705825.pdf
    • https://cdn.shopify.com/s/files/1/0461/7558/4419/files/hope_slick_chain_guide_with_bash_guard.pdf
    • https://cdn.shopify.com/s/files/1/0432/6536/0034/files/12562674703.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_off000094b5.bin
6a3681cbc39ce1942cbe86740e526e82f7b1b62a250790eac64e2908ed4e2ce1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94B5 5056 bytes
font_01_sfnt_off0000a5c1.bin
25b37f7efe4b39380ad503ddd80e234055705b3d5dad48c5fd5f8688faac059a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5C1 10056 bytes

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