Malicious PDF — malware analysis report

Static analysis result for SHA-256 60600239523ff9ae…

MALICIOUS

PDF

43.5 KB Created: 2020-08-11 06:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d66adf7dcf6fbec0061d48edb317ea69 SHA-1: 59ac182d8f568c44538437ed1d7b90813e989118 SHA-256: 60600239523ff9aebb992d277dc57ff322a8a9207ad36988d09c6d1b68a3c81e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or redirection strategy. One prominent URL, 'https://ttraff.ru/pify?keyword=carranza+s+clinical+periodontology+second+south+asia+edition+pdf', is flagged as malicious, indicating a redirection to harmful content. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=carranza+s+clinical+periodontology+second+south+asia+edition+pdf
    • http://files.waiheelimu.org/uploads/1/3/1/6/131607174/nomuvawezilamaranu.pdf
    • http://files.jacobjosephpiano.com/uploads/1/3/0/8/130814121/2443103.pdf
    • http://relazikap.ericdwinnells.com/uploads/1/3/2/6/132681947/4026f9.pdf
    • http://files.blessedredeemerpb.org/uploads/1/3/1/3/131398419/242177.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4431/4024/files/comment_fusionner_plusieurs_en_un_seul_document.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6161/files/fezanodiwu.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/5305563978.pdf
    • https://cdn.shopify.com/s/files/1/0432/4737/0402/files/liwusov.pdf
    • https://cdn.shopify.com/s/files/1/0432/6303/3502/files/namexusoxivumuwifawumuba.pdf
    • https://cdn.shopify.com/s/files/1/0434/4496/1442/files/xivaliwinomo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/89263746840.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8852/files/24690130883.pdf
    • https://cdn.shopify.com/s/files/1/0430/8867/4967/files/6220805740.pdf
    • https://cdn.shopify.com/s/files/1/0431/6001/0912/files/33581929083.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3077/files/7702737739.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dazexirorojukulovamedifuv.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_off00006b9c.bin
34b08cbba3e824c17d53cbfef3c10b216fa4af3fd1f9b78c028b5fa169d070c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9C 5472 bytes
font_01_sfnt_off00007e3e.bin
c8843050d5c51394575a3f52d27016b6ea0fea8a885379e9a509f1d76e1c2070		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3E 10048 bytes

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