Malicious PDF — malware analysis report

Static analysis result for SHA-256 e24efc65342cab25…

MALICIOUS

PDF

45.1 KB Created: 2020-11-05 19:10:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96e365fc1efe7c11bf1655d0addde880 SHA-1: bd727ba1a2d3ee70f8792bdf6195f8976f7b3cfb SHA-256: e24efc65342cab252be776ae8fcc6cd7ff6b26876b2f4cd477b4b97818277d6b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'gettraff.ru'. It also exhibits characteristics of a PDF link farm, containing numerous external links, many of which are benign but serve to obscure the malicious one. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to trick users into clicking it for purported 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://gettraff.ru/strik?keyword=rich+dad+poor+dad+epub+vk
    • https://cdn-cms.f-static.net/uploads/4368989/normal_5f9b6d38d21de.pdf
    • https://cdn-cms.f-static.net/uploads/4374380/normal_5f9aa2f341677.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/95e91b30-8e09-4b90-96ae-ed3dd5356fd7/21008880668.pdf
    • https://s3.amazonaws.com/sukobogixe/example_of_positive_reinforcement_in_dog_training.pdf
    • https://uploads.strikinglycdn.com/files/78514fce-1a38-45a0-98a7-55f973304ceb/skylanders_ring_of_heroes_tier_list.pdf
    • https://s3.amazonaws.com/bifamomove/vive_colombia_viaja_por_ella_ferias.pdf
    • https://uploads.strikinglycdn.com/files/efff21f7-0d25-4277-978c-3bf159742c3a/abzan_company_sideboard_guide.pdf
    • https://s3.amazonaws.com/fasanag/zimorilawepedabelipifo.pdf
    • https://uploads.strikinglycdn.com/files/1c4b8e80-af34-4a8c-bdb0-dc57ad381e19/90459928032.pdf
    • https://cdn.shopify.com/s/files/1/0439/5591/2862/files/glencoe_virtual_lab_answers.pdf
    • https://uploads.strikinglycdn.com/files/5818ab18-de4e-4db4-b9d7-4994f84737fb/computer_repair_guide_book.pdf
    • https://s3.amazonaws.com/damerirazib/34860460881.pdf
    • https://s3.amazonaws.com/muvojugejoxip/suros_regime_ttk.pdf
    • https://s3.amazonaws.com/liwafo/military_mess_kit_definition.pdf
    • https://uploads.strikinglycdn.com/files/25a6f591-b9bd-445d-b843-0e3b10dce994/13763868885.pdf
    • https://s3.amazonaws.com/xurixado/83401265012.pdf
    • https://cdn.shopify.com/s/files/1/0431/9235/2932/files/exercicios_de_globalizao.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006013.bin
d3e2b0ca367f8522c60d4201de253a157bb75b072240d51f1e3264ab79182478		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6013 4920 bytes
font_01_sfnt_off000070d2.bin
ce93802a388f8bb82b83d3edda3aa9845a9246e9c301ddc7c8400f6f206815c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D2 13776 bytes
font_02_sfnt_off00009933.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9933 4324 bytes

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