Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d1f80c152838d5c…

MALICIOUS

PDF

41.8 KB Created: 2020-08-30 11:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 705fc1d94a0f014cb8347638fd235732 SHA-1: 2a766c5a87900dcafa78c2d9f148cd0735dcdc02 SHA-256: 6d1f80c152838d5c990c160f51186a1fc9094929966832b0bd9c40aa3be16ead
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, identified as a redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for "Huzuni 1. 12. 2", suggesting a phishing or social engineering attempt. The presence of numerous external PDF links, many pointing to benign Shopify URLs, indicates a link farm or SEO manipulation tactic to potentially obscure the malicious redirector.

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/wix?keyword=huzuni+1.+12.+2
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0445/7860/3172/files/5k_beginner_training_plan.pdf
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/xudumapipovopopaxit.pdf
    • https://cdn.shopify.com/s/files/1/0437/3577/7445/files/dadenuladalizudike.pdf
    • https://cdn.shopify.com/s/files/1/0439/0024/0024/files/nutrition_during_pregnancy.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wopeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/9513/0266/files/cox_cable_tulsa.pdf
    • https://cdn.shopify.com/s/files/1/0429/3532/0735/files/nozimemazebizenunux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20424522606.pdf
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/oraciones_arcangeles.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/dojibili.pdf
    • https://cdn.shopify.com/s/files/1/0433/7080/7459/files/dudufekegubo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7162/6652/files/kobosozipatupuxutowixaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/wiminiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/8326/8257/files/break_up_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0432/5149/9170/files/eclipse_java_luna_for_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0440/7666/2934/files/76278444804.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_off00006657.bin
a4ff646bcedf1269d8dca26fca636271de249e49ae843592c83c654c2f77e417		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6657 4392 bytes
font_01_sfnt_off00007568.bin
e839cb76480e547dbfc2130013edb5413dc2d8259af76f4577789a642a878002		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7568 10952 bytes

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