Malicious PDF — malware analysis report

Static analysis result for SHA-256 74454df2590c6b19…

MALICIOUS

PDF

43.1 KB Created: 2020-08-10 01:36:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffcf949d5190dd813daf3a5bfd76c8cc SHA-1: 35273d54b727913d71439278e3116223ea97c4e8 SHA-256: 74454df2590c6b19afb1df647768ebf181cf20d9d60451cfe709e1c3dfe4a9ad
154 Risk Score

Malware Insights

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

The PDF document contains numerous links, including one to a known malicious redirector at 'ttraff.com'. The document body, though obfuscated, also contains this URL, suggesting an attempt to lure users to malicious infrastructure. The presence of many external links also indicates a link farm, likely for SEO manipulation or to host 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=surah+yasin+rumi+dan+jawi+pdf
    • http://files.songarchiveproject.com/uploads/1/3/1/4/131437385/durixodajo_lipedozomivuf_mosuri.pdf
    • http://files.vjvhomeimprovements.com/uploads/1/3/1/4/131438639/nosojijevafobe-zazadidudidij-jabamopakedazu-satowetagiwas.pdf
    • http://files.wagsthedog.org/uploads/1/3/0/7/130775665/5196758.pdf
    • http://files.evbuilders.co.nz/uploads/1/3/1/4/131406348/6844621.pdf
    • http://files.phestom.com/uploads/1/3/0/7/130775223/a954427.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/5117/0457/files/79177587917.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3198/files/manual_bases_de_datos_relacionales.pdf
    • https://cdn.shopify.com/s/files/1/0430/1520/9123/files/delta_bench_band_saw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3100392900.pdf
    • https://cdn.shopify.com/s/files/1/0435/6440/0798/files/62554984046.pdf
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/85621378764.pdf
    • https://cdn.shopify.com/s/files/1/0429/1821/5847/files/a1015_transistor_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0436/2780/6883/files/29540493717.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/merudadezomobomado.pdf
    • https://cdn.shopify.com/s/files/1/0444/4828/4839/files/geometry_construction.pdf
    • https://cdn.shopify.com/s/files/1/0435/1010/4228/files/bizasezifolisipafibosoku.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_off00005fe6.bin
22055cf544b7ab71aed584db81032989fe0b216d94b5f5a6892599207a296b70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE6 5620 bytes
font_01_sfnt_off000072fd.bin
b85a3ed1277ad27370d308d9d1fdc29afb91f85ae7a9f5cb0914347c7f8027df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72FD 14312 bytes

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