Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea6455b49747ca6b…

MALICIOUS

PDF

45.6 KB Created: 2020-08-29 03:08:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f60298dc64ea938a9f046c26dc642c68 SHA-1: 050a5241cd38bb79db4f1ce20034b6f2af098301 SHA-256: ea6455b49747ca6b9a558ad175323208b55a67f491592586be82d3348bac4cef
152 Risk Score

Malware Insights

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

This PDF file acts as a link farm, containing 30 embedded links to other PDF documents hosted on Shopify. One of these links, 'https://ttraff.com/wix?keyword=yamaha+rx-v750+bluetooth', is identified as a malicious redirector. The primary purpose appears to be to direct users to malicious infrastructure through this redirector, potentially for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this 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.com/wix?keyword=yamaha+rx-v750+bluetooth
    • https://cdn.shopify.com/s/files/1/0461/9878/4149/files/datediff_crystal_reports_hours_and_minutes.pdf
    • https://cdn.shopify.com/s/files/1/0432/2672/6568/files/figasabumuzoxaniwurija.pdf
    • https://cdn.shopify.com/s/files/1/0450/5364/0856/files/amar_chitra_katha_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/superscript_in_markdown.pdf
    • https://cdn.shopify.com/s/files/1/0438/9833/9496/files/lancaster_canal_pike_fishing_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/6038/7240/files/wavamoderamavuxotajomu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2301/5841/files/photosynthesis_and_cellular_respiration_crossword.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5352/files/gavizereligiwiv.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d7decd2b1cc4cf390df266a4601fc14.pdf
    • https://static.usrfiles.com/ugd/b8c837_d75d49960f9c47feb215f5ad939edd75.pdf
    • https://static.usrfiles.com/ugd/b8c837_07a66f47cd6d43139eb519c32810930a.pdf
    • https://static.usrfiles.com/ugd/b8c837_50d717412911452c9e850a5bb5fc6dc9.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d10fabd072346dda4cf7dba52b25347.pdf
    • https://cdn.shopify.com/s/files/1/0434/4872/9766/files/app_store_apk_2018.pdf
    • https://cdn.shopify.com/s/files/1/0439/8471/5934/files/xidegibazamazexiwuxaji.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066ff.bin
fd4e0931335f0d928a4c5c5628260b5ca95eb118a7662018468f97695543b231		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66FF 5080 bytes
font_01_sfnt_off00007865.bin
12be2c2e60db198998b3deeb5dfbb82c5e8a8421b92e97cfd1d0ad9db29cb377		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7865 10348 bytes
font_02_sfnt_off00009bb1.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB1 4324 bytes

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