Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ac6eeb88d308bd6…

MALICIOUS

PDF

44.4 KB Created: 2020-08-10 09:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5e7c14ca6210ef327409dcbc3daaa75 SHA-1: 37716930e096faf0265c70305b62f740984564a4 SHA-256: 5ac6eeb88d308bd60ab49d00cf4bf898e1a262b7e3118d15da6c5a96144d867c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources. One of these links, https://ttraff.ru/pify?keyword=waffle+slab+design+example+pdf, is identified as a malicious redirector. The document's structure and content suggest an attempt to disguise malicious links within seemingly legitimate design examples, likely to trick users into visiting harmful sites.

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/pify?keyword=waffle+slab+design+example+pdf
    • http://files.kwingard.com/uploads/1/3/1/8/131856234/tazara_pumoxuwovare_robesewu_fusokopedudafoj.pdf
    • http://files.littlebranchesruralroots.com/uploads/1/3/1/4/131406893/jekifelisa.pdf
    • http://renijeg.warwickvfw.org/uploads/1/3/0/8/130874493/duvaxivotavez-jojivakisaker-fejufejivapagor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/47947044005.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61403973964.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/88727179376.pdf
    • https://cdn.shopify.com/s/files/1/0434/3277/1734/files/wagezuxagup.pdf
    • https://cdn.shopify.com/s/files/1/0434/8978/8069/files/zexutekezonabamebe.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/6958144324.pdf
    • https://cdn.shopify.com/s/files/1/0433/8899/3699/files/4244399952.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/96025331189.pdf
    • https://cdn.shopify.com/s/files/1/0437/1585/4490/files/wixekivalorajax.pdf
    • https://cdn.shopify.com/s/files/1/0440/5572/4197/files/adjectives_ending_in_ed_and_ing_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3294478915.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_off0000628f.bin
b2594d3218e11dc1b437b932eb8efb91062531aa93a2e033350de28982dc868d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x628F 5084 bytes
font_01_sfnt_off000073c8.bin
189836c192ceea05833dd522ac24a247f746b1ff82f1b93e6e62b0d602e6e156		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C8 10348 bytes
font_02_sfnt_off000096fa.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96FA 4324 bytes

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