Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0e4524e7e0291a…

MALICIOUS

PDF

42.2 KB Created: 2020-08-04 14:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4ab953d29a589d34fbadb75108013ed SHA-1: 142dbbc2f6a2f9428384c43107718f8e52de7e25 SHA-256: ad0e4524e7e0291ac7e9081f90c48f429a4a9dc44d8b8c60111dca69f3c98f5f
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=ceramics+monthly+magazine+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=ceramics+monthly+magazine+pdf', indicating a lure to a malicious site disguised as a magazine PDF.

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://ttraff.cc/pify?keyword=ceramics+monthly+magazine+pdf
    • http://files.mpcaa.net/uploads/1/3/1/0/131070459/9465928.pdf
    • http://files.visitsmartenergy.com/uploads/1/3/1/4/131411688/1808370.pdf
    • http://files.hairloungeltd.co.uk/uploads/1/3/1/8/131871571/tuxorobizowi_gipilutepib_wixaxumuv.pdf
    • http://files.coudrayacupuncture.shop/uploads/1/3/0/7/130739146/mekamabofezub.pdf
    • https://cdn.shopify.com/s/files/1/0428/0749/2775/files/zupepatolobawibajot.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5609/files/how_to_delete_every_message_on_discord.pdf
    • https://cdn.shopify.com/s/files/1/0434/0695/0558/files/19077498820.pdf
    • https://cdn.shopify.com/s/files/1/0447/2075/0745/files/destroy_the_opposition_jamie_lewis.pdf
    • https://cdn.shopify.com/s/files/1/0431/2681/6932/files/tonuta.pdf
    • https://cdn.shopify.com/s/files/1/0440/0925/9158/files/41342223475.pdf
    • https://cdn.shopify.com/s/files/1/0431/0050/4217/files/how_to_make_a_bowl_in_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/diwuwezise.pdf
    • https://cdn.shopify.com/s/files/1/0429/3096/2588/files/icao_annex_2_rules_of_the_air.pdf
    • https://cdn.shopify.com/s/files/1/0438/0544/2209/files/pukuxosazabapej.pdf
    • https://cdn.shopify.com/s/files/1/0427/5788/2022/files/87852316198.pdf
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/leccion_7_contextos_logico_o_ilogico.pdf
    • https://cdn.shopify.com/s/files/1/0430/6668/7639/files/87029988654.pdf
    • https://cdn.shopify.com/s/files/1/0428/5172/9567/files/26185235662.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_off000063ba.bin
28471fe0dc5b932a7dd8a645d7f602fdfb2712cf1df5a78524627d1cceb89ded		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63BA 5628 bytes
font_01_sfnt_off000076c2.bin
531849ab511b4c1ac2d39d3840ab65f4206a27de8dc884257071663c16698f71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C2 10900 bytes

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