Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a9006ac1b148a3…

MALICIOUS

PDF

40.4 KB Created: 2020-10-30 00:47:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb01d35a813a0f187f2506fd818889c4 SHA-1: 7b947ee09ebc60ce959cd4a0ca2effd2cb771d28 SHA-256: f0a9006ac1b148a3be00758cdf1fcdb75cd3f3428011d6516f79b1c02230a24c
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?keyword=piggy+bank+ideas'. The document body, though heavily obfuscated, also contains this URL and other suspicious URLs hosted on weebly.com. This indicates the file's primary purpose is to lure the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://gettraff.ru/123?keyword=piggy+bank+ideas
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/belapigojat.pdf
    • https://rokumetusemep.weebly.com/uploads/1/3/4/3/134382705/398d9b.pdf
    • https://jurizimobijagi.weebly.com/uploads/1/3/0/8/130874317/f9904.pdf
    • https://cdn-cms.f-static.net/uploads/4380700/normal_5f8ca6859ed89.pdf
    • https://xotiroxo.weebly.com/uploads/1/3/0/7/130776105/3105143.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/31b3c9e8-72d9-4ed8-aedc-5171a55e5be8/.pdf
    • https://s3.amazonaws.com/mukutud/capitulo_5a_realidades_1_answers_page_91.pdf
    • https://cdn.shopify.com/s/files/1/0486/2469/7509/files/setting_healthy_boundaries_in_relationships_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0500/8582/2636/files/cash_flow_per_share_formula.pdf
    • https://s3.amazonaws.com/muvojugejoxip/biology_book_miller_and_levine_online.pdf
    • https://cdn.shopify.com/s/files/1/0484/0652/8152/files/nys_unemployment_insurance_claimant_handbook.pdf
    • https://s3.amazonaws.com/leguvefu/fosotiboboromil.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fae.bin
5d962974c4a6e26b2c8817e38a518bc37ffc3b7f6025c618123e0a2b0b821571		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FAE 4068 bytes
font_01_sfnt_off00005e0f.bin
d5b1eaab4015a6c9411feb51ee77e99f8fde32e2db22feacc9320a8adaadd225		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0F 5172 bytes
font_02_sfnt_off00006fc5.bin
8fedd077839ec5599a3387c660b8380e13694e2dc24f0517f44622f6f29cca50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC5 10892 bytes

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