Malicious PDF — malware analysis report

Static analysis result for SHA-256 7868603151025a0d…

MALICIOUS

PDF

51.3 KB Created: 2020-08-12 09:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b19574e184caa16ff7efc1011ae9e286 SHA-1: 60bb01ced414240fccb7ed6f67f8de0fac414daf SHA-256: 7868603151025a0dbddb61e913892162511c7debaaf0c7cefd529d090a218bb2
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of embedded links and the redirector suggest an attempt to lead the user to malicious content, likely for phishing or malware distribution.

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.ru/pify?keyword=canasta+regeln+2+spieler+pdf
    • http://wafegebe.re3institute.org/uploads/1/3/2/8/132814930/1357685.pdf
    • http://pafok.urbanathenscollective.org/uploads/1/3/1/4/131438539/3944744.pdf
    • http://files.noblocky.com/uploads/1/3/1/0/131070762/8cd8a2034cff.pdf
    • http://files.accoladenyc.com/uploads/1/3/0/8/130874090/458e719f13.pdf
    • http://files.kozynook.com/uploads/1/3/0/7/130739011/5f0de502d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5286/6455/files/najomafabirisekiguwu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8515/files/sociological_imagination_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/3329/7058/files/50708296688.pdf
    • https://cdn.shopify.com/s/files/1/0434/4207/7846/files/38142862061.pdf
    • https://cdn.shopify.com/s/files/1/0429/2568/6951/files/15982305381.pdf
    • https://cdn.shopify.com/s/files/1/0432/6857/1294/files/nativewax.pdf
    • https://cdn.shopify.com/s/files/1/0433/5940/4197/files/vofojusikezerujukejob.pdf
    • https://cdn.shopify.com/s/files/1/0438/2906/7933/files/practical_kabbalah_for_magic_and_protection.pdf
    • https://cdn.shopify.com/s/files/1/0428/8859/3567/files/68322335011.pdf
    • https://cdn.shopify.com/s/files/1/0431/0656/6306/files/fuvoja.pdf
    • https://cdn.shopify.com/s/files/1/0427/9618/7815/files/30998885240.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_off00008868.bin
641f3862150c9ef8d760956af48d222d6c3c77f236a7c65d12ed4b1556503c26
pdf-font-stream PDF embedded font (sfnt) at offset 0x8868 5248 bytes
font_01_sfnt_off00009a4c.bin
51bee8a2aecd82edf6ef04e782b84f75baf780c52666e514749235868b497e91
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A4C 11120 bytes