Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8e352afb952a034…

MALICIOUS

PDF

79.8 KB Created: 2020-11-19 12:05:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 460ed664f5c709a3c44eb31857367af4 SHA-1: cb8fe8545d8993145a9853140601854765fd3c87 SHA-256: e8e352afb952a03495095ca76ba61427f1c515b71fe59e3a155ad3d4a78e6650
254 Risk Score

Malware Insights

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

This PDF file contains numerous links to external PDFs, many of which appear to be part of an SEO link farm designed to redirect users to malicious infrastructure. The primary redirector URL identified is https://cctraff.ru/123?utm_term=sega+genesis+model+2+schematic, which is flagged as malicious. The document body, though heavily obfuscated, suggests a lure related to a 'Sega genesis model 2 schematic'. The presence of multiple malicious redirector links and the ML classifier output strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://cctraff.ru/123?utm_term=sega+genesis+model+2+schematic In PDF document text
    • https://cdn-cms.f-static.net/uploads/4446045/normal_5fb2983518bd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392444/normal_5f937cc63cd9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489595/normal_5fb5d4ee85867.pdfIn PDF document text
    • https://mulevemi.weebly.com/uploads/1/3/4/7/134754511/rosovisomejafur.pdfIn PDF document text
    • https://tedibijufu.weebly.com/uploads/1/3/4/6/134678634/xelimexola.pdfIn PDF document text
    • https://lajawenofuki.weebly.com/uploads/1/3/4/5/134501859/274d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378830/normal_5f9632926f382.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405644/normal_5f9ae02bf2bea.pdfIn PDF document text
    • https://totapige.weebly.com/uploads/1/3/1/4/131483287/2536159.pdfIn PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/7414141.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466379/normal_5fa9d10d45002.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387931/normal_5f8ef4238a5d1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6d27756f-3724-424f-819f-9d81738ef883/75539817674.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff90e494-8c33-4dc4-a9a1-0fa781c3adb0/83817048318.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DF 5280 bytes
SHA-256: 2fb34323b12b7550785934bda3b0f483f4c96892a421547d27fa10a1c5a47c9e
font_01_sfnt_off0000f39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39D 14952 bytes
SHA-256: f11f88723e0aea5768e01e52c2142babe00f35b4dab5c0c93586c59d1eeb0333
font_02_sfnt_off000121ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121EC 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e