Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd02ac9cd27d9b27…

MALICIOUS

PDF

58.7 KB Created: 2020-11-07 23:34:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de1931acc1411d604f5167f2f0c0cd2e SHA-1: 17c43943ead8661051a6cb2f29ee2fe3332790a4 SHA-256: dd02ac9cd27d9b274a28d8eb9b6f5ddab12c6c6b6f6209f83d7a934c47f31ba8
154 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content or engage in SEO abuse. Although no scripts were explicitly extracted, the PDF structure itself facilitates the redirection.

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://ggtraff.ru/aws?keyword=the+second+lady+of+the+united+states
    • https://juxupadozimufa.weebly.com/uploads/1/3/4/3/134388451/rixekuja.pdf
    • https://cdn-cms.f-static.net/uploads/4403806/normal_5f973ec86e0df.pdf
    • https://zosibikatojufo.weebly.com/uploads/1/3/4/3/134382834/2151278.pdf
    • https://cdn-cms.f-static.net/uploads/4368505/normal_5f96a3995104a.pdf
    • https://fububekamuko.weebly.com/uploads/1/3/3/9/133986391/pafome-mazadilu.pdf
    • https://dowezepuxaku.weebly.com/uploads/1/3/4/4/134463959/bizoxutubimabavareku.pdf
    • https://jinugavov.weebly.com/uploads/1/3/4/4/134438703/lixekipatumebel.pdf
    • https://xoretesani.weebly.com/uploads/1/3/4/3/134315313/kunod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/441e77fc-8ed9-4666-b536-980dd8882ff8/27713685116.pdf
    • https://uploads.strikinglycdn.com/files/29a878a4-2257-4676-b0ef-c310eb7050ce/sitajaji.pdf
    • https://uploads.strikinglycdn.com/files/13691aed-8033-4347-b1d4-b3a140f3ab6e/zanumuteg.pdf
    • https://felibule.files.wordpress.com/2020/11/povunikilelivu.pdf
    • https://uploads.strikinglycdn.com/files/476a4749-3e18-4b9e-b4a3-cb04addd95d1/did_houston_kraft_and_harley_divorce.pdf
    • https://uploads.strikinglycdn.com/files/898b5f6c-d093-4542-8da2-3c3f81fd9cd2/tv_guide_listings_canton_ohio_time_warner.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_off0000a9c5.bin
ee5d67f24afa7d49772477aafc548be3f2e4d7dc4ead40464c76eebeee79da01
pdf-font-stream PDF embedded font (sfnt) at offset 0xA9C5 5064 bytes
font_01_sfnt_off0000bb0a.bin
45fea02c19eca0968d944aa572798046318bb37825a7e2f87054d910d61c65ec
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB0A 10160 bytes