Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b908858b4531a3b…

MALICIOUS

PDF

48.7 KB Created: 2020-08-07 15:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b6b42acd601ae9be20c843f93da62f3 SHA-1: acecbb1b664fd90a9d4d44e48bb68363b76f7115 SHA-256: 6b908858b4531a3bd3574981b5538bb320415c4d5fb526b45ac84aaebd114790
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=generador+de+energia+eolica+proyecto+pdf'. The document body, though heavily obfuscated, appears to contain text related to wind energy projects, suggesting a lure. The presence of a large number of external PDF links further indicates a link farm or redirection strategy, likely to distribute further malicious 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.com/pify?keyword=generador+de+energia+eolica+proyecto+pdf
    • http://files.feedthebabes.com/uploads/1/3/1/0/131070152/wewuge-bexubero-sibumuze-zebaw.pdf
    • http://files.hnetworks.net/uploads/1/3/1/3/131379306/pubenumilibezub_rikebuvuzobopuf_revibuko_kedurijizami.pdf
    • http://togarubi.bluebeatsmentalhealth.com/uploads/1/3/0/8/130814124/5916201.pdf
    • http://files.glazedamused.com/uploads/1/3/1/4/131455543/599b1c53f01fe7.pdf
    • http://files.cr-routines.com/uploads/1/3/2/6/132682090/33639799c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/8072/6168/files/bilegexibujawidatafodu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/lomenixex.pdf
    • https://cdn.shopify.com/s/files/1/0428/5795/5487/files/zutazojupudafixunisot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/arris_sbg6580_login.pdf
    • https://cdn.shopify.com/s/files/1/0430/1229/2767/files/argument_essay_structure.pdf
    • https://cdn.shopify.com/s/files/1/0431/0797/5335/files/55063513343.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojedeteremedadedarovir.pdf
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/82125902736.pdf
    • https://cdn.shopify.com/s/files/1/0437/5783/0298/files/lawuzax.pdf
    • https://cdn.shopify.com/s/files/1/0433/8165/3655/files/86621066607.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1041/files/99651029570.pdf
    • https://cdn.shopify.com/s/files/1/0437/2329/2822/files/darolakasam.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/wasotoxefa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f26.bin
b2adc8e9833850c355684b461db2b5c5048334dd1ccdfdd97b8803b6b75c8f56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F26 5276 bytes
font_01_sfnt_off00009139.bin
7f11d280d95261c4119b4114d2c1ec506cb390229bf0f7075e5dae04185b8902		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9139 10544 bytes

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