Malicious PDF — malware analysis report

Static analysis result for SHA-256 63913df32e5c0dd6…

MALICIOUS

PDF

40.4 KB Created: 2020-08-28 06:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31642d42111afa4a94b83f031c47baa7 SHA-1: 772408e00282a8a80d5bbd0db591714b408668a8 SHA-256: 63913df32e5c0dd660e67b66744896cea339b4bde147dc65f0dfb118955de220
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that likely serve as lures to external malicious sites, suggesting a phishing or scam attempt.

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=health+the+basics+rebecca+donatelle
    • http://ximines.learningexchanges.org/uploads/1/3/0/7/130775565/9604509.pdf
    • http://vasaziloz.mrisar.org/uploads/1/3/1/4/131453134/ad89007bf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8341/5204/files/lopedopa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19252536586.pdf
    • https://cdn.shopify.com/s/files/1/0436/9360/5014/files/descargar_biblia_de_estudio_arcoiris_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/jonefuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/regovezole.pdf
    • https://cdn.shopify.com/s/files/1/0433/6451/5994/files/71338173371.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8167/files/pasebelupog.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/movojimemajodizewiji.pdf
    • https://cdn.shopify.com/s/files/1/0437/8293/0593/files/mituwakesibofurir.pdf
    • https://cdn.shopify.com/s/files/1/0433/3531/9711/files/molawezibowurekesuzof.pdf
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/desuvutowozodufusozawi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7061/9801/files/itc_bodoni_seventytwo_pro_bold_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/3278/0695/files/47384601031.pdf
    • https://cdn.shopify.com/s/files/1/0430/8202/3061/files/tefawujalirusegum.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_off00006079.bin
7fd077c13e859c788b00aac8bffe7f241d3a15e23949ffb19ab3977f024c022c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6079 5128 bytes
font_01_sfnt_off000071cf.bin
23827896acaa84b50d243da0aad926fdf3a9e6a3c75399b9cd4194b62201d702
pdf-font-stream PDF embedded font (sfnt) at offset 0x71CF 10164 bytes