Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8e3071dc00a2ba2…

MALICIOUS

PDF

34.2 KB Created: 2020-08-11 19:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64cb0a88e831b8190878c4f3d72bec77 SHA-1: 486abe28752f956e010108788d6fbd59ef0b1f45 SHA-256: a8e3071dc00a2ba287566b4526dc767140e82890fbc364a7e550b0b2e47bc0d4
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One of these links, 'https://ttraff.ru/pify?keyword=issuu+pdf+download+link', is identified as a malicious redirector. The document body also contains text that appears to be a lure for downloading PDFs, further supporting the phishing attempt. The presence of numerous links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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=issuu+pdf+download+link
    • http://files.ikebanastudiom.com/uploads/1/3/0/9/130969313/cd96d7.pdf
    • http://files.wickfordbowlingclub.com/uploads/1/3/1/8/131871835/7206860.pdf
    • http://files.purerockcolours.com/uploads/1/3/1/3/131398129/gelujukike.pdf
    • http://digesu.livingstonia.org.uk/uploads/1/3/0/8/130814017/1438580.pdf
    • https://cdn.shopify.com/s/files/1/0436/3167/3504/files/reagan_killer_mike.pdf
    • https://cdn.shopify.com/s/files/1/0429/7991/7987/files/80590989218.pdf
    • https://cdn.shopify.com/s/files/1/0436/5749/4686/files/fe_civil_practice_problems.pdf
    • https://cdn.shopify.com/s/files/1/0432/9386/8187/files/funny_discord_gifs.pdf
    • https://cdn.shopify.com/s/files/1/0433/5593/0783/files/67825277078.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5468/files/43126620293.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/47953642899.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/bobcat_763_service_manual_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8798/files/navapimezesopilipikakoda.pdf
    • https://cdn.shopify.com/s/files/1/0437/2794/5879/files/adjectives_and_adverbs_lesson_plan.pdf
    • https://cdn.shopify.com/s/files/1/0430/2602/2554/files/pitamikuwu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/bd_singh_genetics_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/math_in_the_modern_world_textbook_philippines.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_off000047e1.bin
477bcf99cf96a0e2cab5d3d9fa06694ab16532e2dafeef3c3c93874135c4429c
pdf-font-stream PDF embedded font (sfnt) at offset 0x47E1 5032 bytes
font_01_sfnt_off00005924.bin
359e8fd8e98ddd425204a3bc96a537cdda1540dc9381b81bfdb7263640a9f391
pdf-font-stream PDF embedded font (sfnt) at offset 0x5924 9752 bytes