Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e15ec8b8a877be…

MALICIOUS

PDF

44.5 KB Created: 2020-09-17 01:52:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb5fe3103f46853016dce4797e1a997c SHA-1: d718dcd6b71b7ab0397eae41bb7824d0a766331e SHA-256: d8e15ec8b8a877bec857168cbc1ff2deb94ae7ea1d1a92185252ac95a66bcf94
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary malicious link, 'https://ttraff.me/wix?keyword=nomad+power+system+fact+or+fiction', is flagged as a malicious redirector. The document's structure and content suggest it is designed to act as a link farm, potentially to distribute further malware or phishing content.

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.me/wix?keyword=nomad+power+system+fact+or+fiction
    • https://712ff2e8-032a-48f6-994b-9c72c4aefa60.filesusr.com/ugd/daca0d_79f161c7d80c4899ad83410b2cb96857.pdf?index=true
    • https://9a4aca51-2d94-4fde-a14e-47332347770a.filesusr.com/ugd/93c935_31ea9d55fdcf4be0a3457ee3a0aa4ddb.pdf?index=true
    • https://e1b8cc1b-b525-4fd8-bdda-b106c5afca69.filesusr.com/ugd/57c819_d3d2c4f1c5d54c91a97cb1592e6e414d.pdf?index=true
    • https://ca4c5dcc-c6bf-465b-9186-333f3284f7e0.filesusr.com/ugd/43d598_0050824163c34493ac43cde20b578fd7.pdf?index=true
    • https://6de709e8-d3ca-46a4-9ce5-481b8d3f20b8.filesusr.com/ugd/f55bec_6c491f667c584f49b2601b8d2c89cf56.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0446/7798/8505/files/statistical_data_interpretation_questions_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/0392/7973/files/dezinedutudekebup.pdf
    • https://cdn.shopify.com/s/files/1/0432/2371/1903/files/infographic_resume_template_for_word.pdf
    • https://cdn.shopify.com/s/files/1/0432/6077/2510/files/composition_of_inverse_trig_functions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0439/5106/3195/files/85976491393.pdf
    • https://cdn.shopify.com/s/files/1/0428/8600/4899/files/visixobifirepepebozejabe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pewugokujugiwiburonanas.pdf
    • https://cdn.shopify.com/s/files/1/0449/8564/7272/files/4k_backgrounds_for_photoshop_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061e3.bin
7a48165ecd139412b1a22b634d942fa20f202c0ae7354489326beb1008882abc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61E3 5220 bytes
font_01_sfnt_off000073a4.bin
70d3b283a99798ac9e7150465c69032cc83154ec52abfd6c745c148cad4572ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73A4 10340 bytes
font_02_sfnt_off000096f0.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96F0 4324 bytes

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