Malicious PDF — malware analysis report

Static analysis result for SHA-256 adbce79afce3adb3…

MALICIOUS

PDF

46.8 KB Created: 2020-09-02 09:21:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00b58d7124bf99b39d631181a4bd2160 SHA-1: 8333f0f0c8108d91a72ce1431ea9c9a6735fa146 SHA-256: adbce79afce3adb3e7e6f50ffc0c62ad998b7b417a4d0fa8392c96e403ececfa
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a common tactic for SEO poisoning and link farming. One of these links, `https://ttraff.link/wix?keyword=best+rooting+app+for+android+7`, is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and appears to be a lure for users searching for Android rooting applications. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.link/wix?keyword=best+rooting+app+for+android+7
    • https://cdn.shopify.com/s/files/1/0430/0485/4426/files/rj45_ethernet_wiring_color_guides.pdf
    • https://cdn.shopify.com/s/files/1/0432/0840/9250/files/dragonscale_leatherworking_guide_vanilla.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8428/files/26866813697.pdf
    • https://cdn.shopify.com/s/files/1/0463/5623/4406/files/bulandiyan_song_hardeep_grewal.pdf
    • https://cdn.shopify.com/s/files/1/0433/6451/6005/files/77271099218.pdf
    • https://cdn.shopify.com/s/files/1/0440/6503/0309/files/how_to_download_pokemon_liquid_crystal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tuwaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/lagu_lily_remix_dj_opus.pdf
    • https://cdn.shopify.com/s/files/1/0452/2786/8320/files/caldera_baxi_main_24_fi_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/9991/2344/files/jomifev.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9488/files/how_to_make_artboard_transparent_in_illustrator.pdf
    • https://cdn.shopify.com/s/files/1/0434/7451/8178/files/college_website_templates_w3schools.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_off00007915.bin
a8e8a660c157fe5d3d6238f4282ed7640d49aa26bcbf71d798fc4015381cc9f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7915 5308 bytes
font_01_sfnt_off00008b3a.bin
ac56e24469642d79f43694ab9676398a095d2e16767cd377a07e00bdfe9e290c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B3A 10364 bytes

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