Malicious PDF — malware analysis report

Static analysis result for SHA-256 129f9981f9d78419…

MALICIOUS

PDF

44.2 KB Created: 2020-08-07 01:08:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1580b73bcdb08bdd94f6679c2c4ceb51 SHA-1: 529ad8811ce4c7cb22eb6b172bbf640468c1dbf8 SHA-256: 129f9981f9d784199525df93618036094d3b82f948a633f848c3efb59fc3419c
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified as a redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to a 'Kaufland catalog online pdf'. The presence of numerous external PDF links, many pointing to potentially malicious or unknown domains, further supports the malicious intent. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document.

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.cc/pify?keyword=kaufland+catalog+online+pdf
    • http://files.iamc94.com/uploads/1/3/0/7/130775633/wigikurenek-segaxopi-giwujepomugef-rogimuroj.pdf
    • http://files.brigidcoleridge.com/uploads/1/3/1/4/131455158/notutokonoba_mezidurimerojoj_zigufusezesi_paxizu.pdf
    • http://files.kentuckyoldgrowth.org/uploads/1/3/1/4/131407469/203848.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/8993/6025/files/prevencion_de_accidentes_laborales.pdf
    • https://cdn.shopify.com/s/files/1/0430/8720/0418/files/youtube_audio_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6305/8340/files/90012242261.pdf
    • https://cdn.shopify.com/s/files/1/0429/1385/7692/files/45512650930.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1062/files/29398495752.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2072/files/95791202753.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/organic_chemistry_brown_iverson_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/0814/7112/files/dadadasatoserujotozenof.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1077/files/werawutobamumidexovivib.pdf
    • https://cdn.shopify.com/s/files/1/0438/6593/1936/files/85365683737.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8372/files/gakupipik.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_off000062c3.bin
10ab75498cef337f4655417d59da303f4b07a1915380e2b4cb7f40dd9e600f76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C3 4900 bytes
font_01_sfnt_off00007388.bin
72d30f50dc575425efae2ad06a42f211e972d18e2ccf90db27b21fd0ce1e95d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7388 10060 bytes
font_02_sfnt_off000095f0.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95F0 4324 bytes

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