Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e27eeeac81c254d…

MALICIOUS

PDF

47.0 KB Created: 2020-08-08 06:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c72506bfd3aaa98cac6c6118e4da02c1 SHA-1: 289270f391e861614a56f42bcd84b8acadded8aa SHA-256: 5e27eeeac81c254d8cdb4b9b9143d7f506d09350e5c0a9bf38a6757b46d417ab
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying it as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for 'Acta constitutiva de grupo bimbo pdf'. The primary malicious IOC is the redirector URL, which likely leads to 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.ru/pify?keyword=acta+constitutiva+de+grupo+bimbo+pdf
    • http://files.vcubeconstructions.com/uploads/1/3/2/6/132695663/7d5cf12c9a8fa.pdf
    • http://files.sailinhistory.eu/uploads/1/3/0/7/130775310/domesuzezofiv.pdf
    • http://files.statementzine.com/uploads/1/3/1/0/131069890/jinevigodarifoj-subetugumep-jogula.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/5917/3784/files/xabomokolulejove.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2581/files/89216425212.pdf
    • https://cdn.shopify.com/s/files/1/0431/6649/8965/files/74055515865.pdf
    • https://cdn.shopify.com/s/files/1/0434/5148/2278/files/33677872785.pdf
    • https://cdn.shopify.com/s/files/1/0436/4409/2566/files/pevasaxetujubuwidoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/32285843102.pdf
    • https://cdn.shopify.com/s/files/1/0428/8276/0870/files/63146294671.pdf
    • https://cdn.shopify.com/s/files/1/0437/8198/0317/files/94517099374.pdf
    • https://cdn.shopify.com/s/files/1/0433/9440/0423/files/biomateriales_dentales_libro.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8902/files/45009982091.pdf
    • https://cdn.shopify.com/s/files/1/0433/1854/2504/files/online_cv_maker_in_format.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/41484350966.pdf
    • https://cdn.shopify.com/s/files/1/0439/0620/3803/files/definition_of_work_motivation.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_off000068ab.bin
45d49ea54fc29d978e73e297f510f0aea288f40dba7999e38b9f40d4029f125d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68AB 5516 bytes
font_01_sfnt_off00007b4b.bin
a8235c7d25e72c3a20e5e4cee0ab367d5976422df509222d793e965d376f9d58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B4B 11548 bytes
font_02_sfnt_off0000a0e7.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0E7 4324 bytes

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