Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca37ad7f1ec2fa0b…

MALICIOUS

PDF

49.6 KB Created: 2020-10-09 04:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ba39c84aa2476bf6c217f6458621312b SHA-1: fed4f1f19bccadab7a975c2acaafe8fb13663d69 SHA-256: ca37ad7f1ec2fa0bbe0dfbe1b81ed0501870af2a1481761c90c2555644f4d6cd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various platforms. One of the primary links, 'https://ggtraff.ru/pify?keyword=stella+glow+ending+guide', is identified as a malicious redirector. The document's structure and the presence of a malicious redirector suggest it is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites. No scripts were extracted, but the PDF's nature as a link farm implies an intent to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/pify?keyword=stella+glow+ending+guide In PDF document text
    • http://files.gstrackers.org/uploads/1/3/0/8/130874125/677900.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8233/7444/files/northern_high_school_md_athletics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6297/6921/files/jabezotafiwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9744/6818/files/5e_handaxe_sneak_attack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7439/1709/files/vukivus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9126/9534/files/path_of_exile_addon_launcher_and_manager.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1af89221-f79c-4a8e-a0df-8fd8b8c06064/9600570315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b208e5d7-b142-4241-97a6-4ff694803fc3/19033251376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43fd9bb3-19f1-4201-ba30-e3bc4060176d/minolafav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3742/5818/files/pufobajupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6285/1749/files/at_the_dark_end_of_the_street_chapter_6_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7392/9369/files/screen_recorder_with_facecam_and_screenshot_capture_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3414/7989/files/sedipimakusu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8696 4912 bytes
SHA-256: 3c80c0abbc0f9d1bd72958efe43e315635f06754c0dc07413d7a3a246fa2fb45
font_01_sfnt_off0000976f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x976F 10088 bytes
SHA-256: 288ecf5e123fef40e31406984990093072fa36ff7a91864ea8cb2f0db6bc6c66

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