Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b7a11172540f593…

MALICIOUS

PDF

34.0 KB Created: 2020-08-31 20:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: caa2b882577ac31e5b1e469a43834d21 SHA-1: e9ff1b923f53f17c0e830e51b9cbd94ba8f91393 SHA-256: 2b7a11172540f5934510c011c617ab9661c327923d0ed710b843877138f338e7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link, pointing to a URL that appears to be part of a link farm. The document body, though heavily obfuscated, contains the same redirector URL and several other benign-looking PDF links, suggesting a tactic to obscure malicious intent. The ML classifier also strongly indicated maliciousness.

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.me/pify?keyword=bazaar+kannada+movie+video In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/0dcf4b_5133d8a20d8f4328861b5cdabfdee75c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_c832d220f17643b9b1c72a2132dd6682.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cafc24_e93be763086849a5b4036d31449df208.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fbccce_b938d51a2611455a9ba188e9603ee453.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c8a981_0c8f5236aac0449ebdd34b7fc821d786.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b3bc21_abd66b8fc8924ef489045da9b7401110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5443/8302/files/mejojiwotasepexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/6605/7881/files/sujulodilovugorar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4371/5222/files/61052397768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0885/0081/files/79254159960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7228/9942/files/taxi_driving_3d_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4942/6839/files/jefawogawij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6108/3288/files/seether_broken_lyrics_meaning.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4739 4984 bytes
SHA-256: 03cd6ba137c7296dc5cdddaf94ec54421338d72839834cae5cfd27038a41b333
font_01_sfnt_off00005828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5828 10004 bytes
SHA-256: 5d7d93ff024c449733805c67044a534def67f7d6919801816653fa0a7b7a31eb

Open this report in the interactive analyzer, or submit your own file for analysis.