Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59c478904ab9085…

MALICIOUS

PDF

34.7 KB Created: 2020-10-11 13:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69c000c294ff524dbb66383885b35c5e SHA-1: db7d6d8a6d57fe0c53fd64a9a0ea0fca80d894e8 SHA-256: a59c478904ab9085632b58d824615d473a8e3e8f599c2dfbe5c57e3a281b5455
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ggtraff.ru, which is likely the primary malicious payload delivery mechanism. The document body itself contains garbled text alongside the malicious URL, further indicating a deceptive lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://ggtraff.ru/strik?keyword=tekkit+classic+sphax+texture+pack+1.2.5
    • https://site-1043294.mozfiles.com/files/1043294/jolutokebazowevosipe.pdf
    • https://site-1037916.mozfiles.com/files/1037916/35275736674.pdf
    • https://site-1038387.mozfiles.com/files/1038387/4938221537.pdf
    • https://site-1036743.mozfiles.com/files/1036743/46176030514.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0485/0715/8690/files/the_war_that_saved_my_life.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3863/files/danmachi_season_2_episode_list.pdf
    • https://cdn.shopify.com/s/files/1/0476/7239/3894/files/caddo_home_learning_page.pdf
    • https://cdn.shopify.com/s/files/1/0486/0195/6520/files/hot_dog_pillowcase_pattern_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/1624/0807/files/orar_sin_cesar.pdf
    • https://uploads.strikinglycdn.com/files/21f20feb-bfef-4af0-aad0-c3493baa217e/pumumujovisufixo.pdf
    • https://uploads.strikinglycdn.com/files/099b8b38-dc09-42d7-903e-71900c203626/63248333223.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006063.bin
9085b288d0f942fb434a880dc71e7607b8c12ca9eca848e7862f659bdcc0c770		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6063 5440 bytes

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