Malicious PDF — malware analysis report

Static analysis result for SHA-256 17b59282d35f1972…

MALICIOUS

PDF

45.5 KB Created: 2020-08-11 18:45:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 813248cc4bb2fb0ce2bacd119e20e5bb SHA-1: 6121ec4b2300833399ca6cc9742349e5cc071896 SHA-256: 17b59282d35f19721259a9505dca868914c25f273a62f5fa6e3a7909c8de3b18
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which are designed to appear as PDF files hosted on Shopify. The primary redirector URL, 'https://ttraff.cc/pify?keyword=ardhanarishvara+stotram+telugu+pdf', is flagged as malicious. This suggests a link farm or SEO poisoning attack aimed at directing users to malicious content. The ML classifier also strongly indicated maliciousness.

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=ardhanarishvara+stotram+telugu+pdf
    • http://files.lenaseikaly.com/uploads/1/3/2/8/132814990/mutezagurebofug_fupanap_rugobowogu.pdf
    • http://files.mygentlehealth.com/uploads/1/3/1/8/131856645/60371c55546305.pdf
    • http://files.thelittlefestival.com/uploads/1/3/1/3/131383377/30bbd9af9912c.pdf
    • http://files.macbrosbball.com/uploads/1/3/1/3/131398088/e8b450c83c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4060/4314/files/bowunasel.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3749/files/xebivenifoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/3224/7457/files/54463056438.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/fadebofozuzigit.pdf
    • https://cdn.shopify.com/s/files/1/0428/7833/7187/files/87773399589.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/airport_extreme_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0435/2904/4119/files/zetokivifivasonajimovoxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8602/0761/files/lujowowoja.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2643/files/vosez.pdf
    • https://cdn.shopify.com/s/files/1/0430/3575/4650/files/39427812802.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9430/files/woluwesobu.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005717.bin
b5bc9721593538cdb83b9c8c95bad7ac74c8f9fac3848c82c3e0215cb28591a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5717 5504 bytes
font_01_sfnt_off000069a9.bin
e1fca1654754a3c1945afeed9980bcf4276dd7b033c055882ef4c0ce2bad61ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69A9 12812 bytes
font_02_sfnt_off00009167.bin
6820151f9a4816bccc9e85e605aef44ce22c8924dfcccd161584754f275bf028		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9167 16132 bytes

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