Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ea2573ee7c54bb…

MALICIOUS

PDF

41.2 KB Created: 2020-08-22 12:50:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 139b89580f1bd83114051911001f29ea SHA-1: d9dfda66dd767aa2129cee28bc341de004a4358f SHA-256: 14ea2573ee7c54bbcebbde3620943f5f885a4d37a35a4c925c4c21a1a6210d06
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector. The document body also contains the same malicious URL, suggesting an attempt to trick users into clicking it for a supposed PDF download. The ML classifier strongly indicates maliciousness, and the presence of a redirector link supports a phishing or scamming attack pattern.

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=autobiography+of+a+yogi+pdf+in+kannada
    • http://gapoto.redwood4h.org/uploads/1/3/0/9/130969525/nanuva_xofol_zurobuxelupete_jodidabitito.pdf
    • http://files.marketable-mama.com/uploads/1/3/1/1/131163578/gilet_kogazevomopobaf_womowede.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2392/5402/files/22578182749.pdf
    • https://cdn.shopify.com/s/files/1/0437/3757/9674/files/minecraft_frog_skin.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4996/files/divesibebizo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/43770861095.pdf
    • https://cdn.shopify.com/s/files/1/0432/6516/3422/files/17233115180.pdf
    • https://cdn.shopify.com/s/files/1/0437/8116/1111/files/gigitofumoralulovi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9532/6887/files/janodakenapebakuwiwo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6365/7119/files/oceans_and_seas_of_the_world.pdf
    • https://cdn.shopify.com/s/files/1/0433/6422/1077/files/autocad_2016_complete_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0439/8625/6030/files/sheetz_corporate_office_claysburg_pa.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/divumajuzibuma.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_off000061fd.bin
50e752de77af348f2bf4299484ae244abb995628e447109006a65128c6620748
pdf-font-stream PDF embedded font (sfnt) at offset 0x61FD 5388 bytes
font_01_sfnt_off00007450.bin
624dca6a55eaa7580196a0d2dce94f2ccab9e696f612516de881ab1bf37f8280
pdf-font-stream PDF embedded font (sfnt) at offset 0x7450 10652 bytes