Malicious PDF — malware analysis report

Static analysis result for SHA-256 2565d11759efacbf…

MALICIOUS

PDF

34.4 KB Created: 2020-11-09 02:22:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43a4cecd554285a749ff5e4ebc0ca867 SHA-1: 129defa75435549e7e8f17d38854913c2f02af0a SHA-256: 2565d11759efacbf2b9d0bc08299430bba6642df926a8625900b2d3c776b7287
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. This suggests the document is designed to drive traffic to malicious sites, potentially for phishing or SEO manipulation. The ML classifier strongly indicated maliciousness, and the presence of numerous external links supports this assessment.

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://traffmen.ru/123?keyword=watchfreemovies.ch+sister+act
    • https://cdn-cms.f-static.net/uploads/4412889/normal_5f9ca1034ea5d.pdf
    • https://cdn-cms.f-static.net/uploads/4374207/normal_5f971b243c4ba.pdf
    • https://wobafedufuj.weebly.com/uploads/1/3/4/0/134012960/d34012796ce63ec.pdf
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f8bccf6aec55.pdf
    • https://cdn-cms.f-static.net/uploads/4369158/normal_5f9a3a35e7a4e.pdf
    • https://cdn-cms.f-static.net/uploads/4403541/normal_5f95e6bc275f8.pdf
    • https://cdn-cms.f-static.net/uploads/4405467/normal_5f9a0cd581ffd.pdf
    • https://patelevenimo.weebly.com/uploads/1/3/1/4/131437444/jivujisojumosas_nasuxigixirolu_rugob_xezopor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://xebetok.files.wordpress.com/2020/11/airtel_digital_tv_tamil_channel_list_with_number.pdf
    • https://s3.amazonaws.com/fidefofudi/38383294340.pdf
    • https://uploads.strikinglycdn.com/files/6c6af022-6307-47a7-9085-a0e25e21f686/livret_de_messe_enterrement_word.pdf
    • https://batenixe.files.wordpress.com/2020/11/4246769219.pdf
    • https://s3.amazonaws.com/xunilukegez/99651930179.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_off000048ae.bin
447c4cadd76878f94fc26c34f0653794669b836c7debda980e0270ab03bfed81
pdf-font-stream PDF embedded font (sfnt) at offset 0x48AE 5192 bytes
font_01_sfnt_off00005a4a.bin
fa217a0dd32bd1779903575802f3f71076910fbb86e2ef6801c4c601ac14e2b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A4A 10112 bytes