Malicious PDF — malware analysis report

Static analysis result for SHA-256 05f14a21452629fd…

MALICIOUS

PDF

44.9 KB Created: 2020-08-25 02:08:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f51c90a6b7bf23aca314eb15733e700 SHA-1: e3500f549520b52666b2462846586c03c44cb603 SHA-256: 05f14a21452629fdff7438d05f98e01c2f6a17b784daedbbbf36ac78087ebffb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a deceptive message about Android authentication, coupled with numerous links. One prominent link, 'https://ttraff.com/pify?keyword=android+authentication+is+required+play+store', is identified as a malicious redirector. The document also features a link farm pointing to various PDF files, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. The ML classifier strongly indicates 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.com/pify?keyword=android+authentication+is+required+play+store
    • http://files.dapstempest.com/uploads/1/3/1/3/131380547/0f10a17e547f313.pdf
    • http://files.aroundtheboundary.com/uploads/1/3/1/4/131438641/6085d0473cf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/68108404138.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/66964865231.pdf
    • https://cdn.shopify.com/s/files/1/0431/8334/1728/files/39469821192.pdf
    • https://cdn.shopify.com/s/files/1/0430/8772/4704/files/halgi_bajau_kya_song_pagalworld.pdf
    • https://cdn.shopify.com/s/files/1/0439/0567/9528/files/the_bookseller_of_kabul_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0451/4365/4565/files/astm_d638_02a.pdf
    • https://cdn.shopify.com/s/files/1/0435/3739/9960/files/gubes.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5312/files/zapikuba.pdf
    • https://cdn.shopify.com/s/files/1/0434/6599/8501/files/lowes_online_rebate.pdf
    • https://cdn.shopify.com/s/files/1/0432/1162/0509/files/muxuxuwijovowutiviv.pdf
    • https://cdn.shopify.com/s/files/1/0439/5764/9566/files/modejikab.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1287/files/zetusuvip.pdf
    • https://cdn.shopify.com/s/files/1/0447/9824/7069/files/geforce_experience_hotkeys.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070c8.bin
2f7bf604abae8547335e95e3e266e8be54f3976217b1fa5b65e25f6f2fee4262		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C8 5380 bytes
font_01_sfnt_off0000830c.bin
bfdeb0bba79427412614fad5809b04a052e35b913c47aacfa6b350ab6a5159da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x830C 10388 bytes

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