Malicious PDF — malware analysis report

Static analysis result for SHA-256 091ae3c840b1c1a9…

MALICIOUS

PDF

43.6 KB Created: 2020-08-22 22:49:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4959b3332b2a686aef266377f8e787ae SHA-1: 41a245eb15a7c8f01e18efd44ce9767808d4f6fc SHA-256: 091ae3c840b1c1a95811ab26626d5616e7e37af7e6723a64acdeee0a4373d6c5
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains text related to Excel formatting, suggesting a lure to trick users into clicking the malicious link. The presence of numerous external PDF links further indicates a link farm or SEO manipulation tactic to distribute 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=excel+bedingte+formatierung+nur+bei+bestimmter+text
    • http://nuzodape.jjohnsonartist.com/uploads/1/3/1/6/131606295/cd7dd.pdf
    • http://files.randallsimonpiano.com/uploads/1/3/1/8/131856907/zedawajijuvanukuxawa.pdf
    • http://nutozewa.wicksitslit.com/uploads/1/3/1/3/131379678/badimiziwota.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0444/4743/2871/files/hurt_johnny_cash_tab.pdf
    • https://cdn.shopify.com/s/files/1/0440/4707/3445/files/kokewipirifav.pdf
    • https://cdn.shopify.com/s/files/1/0436/1984/4258/files/59743836793.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/nadovemobipuru.pdf
    • https://cdn.shopify.com/s/files/1/0428/9966/9151/files/kubuvalawu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/24046161141.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7314/files/76744522500.pdf
    • https://cdn.shopify.com/s/files/1/0432/9101/7374/files/nonokazipojofepud.pdf
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/mvc_design_pattern_c.pdf
    • https://cdn.shopify.com/s/files/1/0440/4995/7029/files/83690544336.pdf
    • https://cdn.shopify.com/s/files/1/0430/6249/3345/files/pebitabax.pdf
    • https://cdn.shopify.com/s/files/1/0436/4802/4741/files/acopio_de_informacion_metodologia.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_off000066ef.bin
0316fded7ec04853b82770c9cd89f1923055486102fe39d4c2c97895523bdcbf
pdf-font-stream PDF embedded font (sfnt) at offset 0x66EF 5504 bytes
font_01_sfnt_off00007986.bin
86365aad4a44d9d3bafc3b20274b25882e981d97f5e9d3bcd2d823b9237d864a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7986 11452 bytes