Malicious PDF — malware analysis report

Static analysis result for SHA-256 1507be691058f1d9…

MALICIOUS

PDF

34.4 KB Created: 2020-11-01 16:18:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8d6282215a1e76f9b452466c74209c0 SHA-1: 5594707f634835bafd731c47634e134d398f90a0 SHA-256: 1507be691058f1d9bdc7d191ddccd0ece7291f5984d635234cc1e1a7cf0ef273
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://ttraff.com/123?keyword=apk+and+obb+games'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document body and link annotations indicates an attempt to lure the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ttraff.com/123?keyword=apk+and+obb+games
    • https://cdn-cms.f-static.net/uploads/4386081/normal_5f923015d0cf9.pdf
    • https://cdn-cms.f-static.net/uploads/4379614/normal_5f962fda3506b.pdf
    • https://cdn-cms.f-static.net/uploads/4368477/normal_5f890ade94c3e.pdf
    • https://nimewoguvinu.weebly.com/uploads/1/3/4/4/134433183/wivasimetujiw.pdf
    • https://cdn-cms.f-static.net/uploads/4370560/normal_5f9e26e2d6b2b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/kovilowab/manga_achar_recipe.pdf
    • https://cdn.shopify.com/s/files/1/0268/8250/6930/files/creative_brief_template.pdf
    • https://uploads.strikinglycdn.com/files/c36f5498-f845-47c0-a714-0c99d0c18d6c/terraria_wave_bank.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_off00003be3.bin
8c7d8aae125c8336d50155ac374f47c902293cdd0fa77fad4b690a0f772b1754		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3BE3 5004 bytes
font_01_sfnt_off00004cbc.bin
67f46a3fb620d2635d4fd7b3fa91c0dd68accb4973d7d45f1ad76351f58b6e81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CBC 10304 bytes
font_02_sfnt_off00006f3c.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3C 4324 bytes

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