Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ef8a03e7bb8cdc6…

MALICIOUS

PDF

53.3 KB Created: 2020-08-28 11:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4890164ebb19faccf71fe157b9c66de SHA-1: 7654aae263e2497bbc5721280fe5ca2dcaa533ed SHA-256: 4ef8a03e7bb8cdc65038e2a5746e33897ac9b09265c08fd139dc8e13187581d5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=the+metaphysics+of+the+healing+pdf'. This URL is designed to redirect users to potentially harmful content. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains hosting PDF files, suggesting an attempt to manipulate search engine results or distribute content broadly. The ML classifier strongly flagged this PDF as malicious, reinforcing the assessment of a malicious redirector attack pattern.

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=the+metaphysics+of+the+healing+pdf
    • http://files.surelockedin.com/uploads/1/3/0/8/130814208/pokujimisobelol.pdf
    • http://files.sudensuukon.com/uploads/1/3/1/4/131407571/jelubomomaxe-mapobimite.pdf
    • http://files.hajrasouliha.com/uploads/1/3/0/7/130739474/79edbd5.pdf
    • https://cdn.shopify.com/s/files/1/0435/6617/0271/files/43887372685.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/92436159849.pdf
    • https://cdn.shopify.com/s/files/1/0432/1758/4283/files/types_of_artificial_sweeteners.pdf
    • https://cdn.shopify.com/s/files/1/0440/8344/5925/files/agile_methodology_phases.pdf
    • https://cdn.shopify.com/s/files/1/0438/0921/0529/files/discord_bot_commands_code.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/6744792215.pdf
    • https://cdn.shopify.com/s/files/1/0435/7334/6465/files/85289922273.pdf
    • https://cdn.shopify.com/s/files/1/0433/5501/3275/files/vanupuxefazojutixojuzun.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/
    • https://cdn.shopify.com/s/files/1/0

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007776.bin
9e825553c71ebe0f09cf9cb6ae57c633387c30495e3886e5ac6b1ac2935bc4cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7776 5524 bytes
font_01_sfnt_off00008a22.bin
03e6695ce06e73dd52ad9c0249128e27583dc7317bc7f8aa181b48939c71f17e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A22 10480 bytes
font_02_sfnt_off0000adb0.bin
832eebdccdd162b72feca4b56c9b2588ae2c5196ad980d6801bcb530a32a95a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADB0 17132 bytes

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