Malicious PDF — malware analysis report

Static analysis result for SHA-256 de85acbe7f9fb986…

MALICIOUS

PDF

40.4 KB Created: 2020-08-11 21:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 530d2030e8e7e9547a16de8bbc360453 SHA-1: 36990db0edd3b59f3c9399167c9a30e999f152d1 SHA-256: de85acbe7f9fb986cd83048b4813385d716611520afcbfa9b00c3aa92a7898a8
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is the primary indicator of compromise.

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/wb?keyword=les%20pronoms%20personnels%20cm1%20pdf
    • http://tedove.ana-ramirez.com/uploads/1/3/2/7/132710621/7773838.pdf
    • http://files.alexboel.com/uploads/1/3/0/8/130874422/b1cc82.pdf
    • http://fugaxej.flyintofirstgrade.com/uploads/1/3/0/7/130775818/3541845.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/how_to_screen_share_discord.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/adjectif_qualificatif_ce1.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/49786910301.pdf
    • https://cdn.shopify.com/s/files/1/0437/7857/2450/files/4566167992.pdf
    • https://cdn.shopify.com/s/files/1/0430/5872/5018/files/84664244431.pdf
    • https://cdn.shopify.com/s/files/1/0431/2550/6208/files/24056124251.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/jisix.pdf
    • https://cdn.shopify.com/s/files/1/0440/0722/7550/files/kettering_college_canvas.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/spanish_dictionary_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/69278501311.pdf
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/82381026886.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4189/files/detesamovabekesuw.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_off00005b24.bin
8a58c7d76b191ccc8027582ff3de3fdc53879c90391680ea23697fe7da2cd2e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B24 5084 bytes
font_01_sfnt_off00006c5e.bin
823552fa2a4e19ace9be5837bc9b97199c655b242b746b878c2ab23f9964b147		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5E 12180 bytes

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