Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46859a52134e7ab…

MALICIOUS

PDF

44.6 KB Created: 2020-08-23 23:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8449f666db0c7ee5b93e797302b57a3c SHA-1: e8e02cfbd5b70e976f742cffe718bc373c8a0659 SHA-256: d46859a52134e7ab86c8cabdf2dfc24406c73da2e86083f11f1a242b85577477
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which point to a redirector service. The document body, though heavily obfuscated, contains text that appears to be a fake error message, likely intended to trick the user into clicking the malicious link. The primary malicious URL identified is https://ttraff.ru/pify?keyword=error+sft++fail+4008.

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.ru/pify?keyword=error+sft++fail+4008
    • http://files.bluecactuspoolservice.com/uploads/1/3/1/8/131857114/tunuzovu.pdf
    • http://files.littlecoveliving.net/uploads/1/3/1/3/131398164/7bd475c0.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/90687696164.pdf
    • https://cdn.shopify.com/s/files/1/0430/5495/6695/files/case_files_emergency_medicine_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/8389/0850/files/59439701177.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pijajaza.pdf
    • https://cdn.shopify.com/s/files/1/0438/5082/5893/files/minecraft_hunger_games_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/8468/5220/files/rwby_bilibili_game_apk.pdf
    • https://cdn.shopify.com/s/files/1/0433/2892/9960/files/free_education_law.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/31146810724.pdf
    • https://cdn.shopify.com/s/files/1/0454/7867/4584/files/40088476688.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_off0000714c.bin
838a1425593775f8c06955c08672868470a97d885b4deb6492cff5cf8c0186d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x714C 5144 bytes
font_01_sfnt_off000082d0.bin
c0c34e8639e29a76054b01cd7fcf8a87a0b7ceafd4ee4c15865a692412e2102e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82D0 10368 bytes

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