Malicious PDF — malware analysis report

Static analysis result for SHA-256 f500f46a88a4d607…

MALICIOUS

PDF

38.2 KB Created: 2020-07-21 08:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c77ba3b09732a5fd9d409572cd684a03 SHA-1: cb5598171ce458d1cfe30b5fcb86003b0eca0cf6 SHA-256: f500f46a88a4d6075b0a2a5f379a733ee238c94733d8b9d95f69cabba3bf8549
152 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic firing indicates a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to a 'coffee maker manual'. The presence of 17 PDF links, many hosted on Shopify, suggests a link farm designed to attract traffic and potentially distribute malware.

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/wb?keyword=salton%20three%20for%20all%20coffee%20maker%20manual
    • http://files.katrinaperdue.com/uploads/1/3/0/7/130775151/3069054.pdf
    • http://files.jessicaleemanton.com/uploads/1/3/1/3/131384115/ledugirafunituzufo.pdf
    • http://files.iucnbsg.org/uploads/1/3/1/4/131438024/686dfb92f68596.pdf
    • http://files.enlightenunutrition.com/uploads/1/3/0/9/130969603/gixesegek.pdf
    • http://files.jessicaleemanton.com/uploads/1/3/1/3/131384115/le
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/zukit.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0944/files/50117411983.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/vidizumox.pdf
    • https://zemuderowu.files.wordpress.com/2020/06/baworejixexeruvilutuse.pdf
    • https://wofuwak.files.wordpress.com/2020/06/mikenobupezetajawadanadon.pdf
    • https://kanagop.files.wordpress.com/2020/07/65958577388.pdf
    • https://cdn.shopify.com/s/files/1/0434/0793/3603/files/79646365750.pdf
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/tuwuwusagosuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/norojakibi.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/pofizuliridakuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/55195319911.pdf
    • https://cdn.shopify.com/s/files/1/0433/5583/2469/files/62243920195.pdf
    • https://cdn.shopify.com/s/files/1/0430/5725/0455/files/bapitajupeliwarokurujodo.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_off0000598d.bin
597d883982def424ed184a33e15d4debc603f647cd3444df160938fc800c7e1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x598D 4944 bytes
font_01_sfnt_off00006a25.bin
a279e31542542d4722ece96128a21cacccbad76c371d95d390bc211afab669bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A25 9656 bytes

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