Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b66864656706f2b…

MALICIOUS

PDF

66.4 KB Created: 2020-11-24 07:46:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d14f03c5ed8d76e10e591eacb8e5c795 SHA-1: 4d492f3afa893ede5820b51aecfe22aa12bd2940 SHA-256: 6b66864656706f2b3694762276dc6ade1830b2e512475a5e904c6601862fb2c6
214 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. ClamAV detection confirms it as Pdf.Phishing.Trojan. The embedded links, such as https://gettraff.ru/123?utm_term=sorcery+points+explained, indicate a phishing or malicious redirection attempt. The presence of numerous links suggests a strategy to distribute traffic or deceive users into visiting harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/123?utm_term=sorcery+points+explained
    • https://cdn-cms.f-static.net/uploads/4411500/normal_5fa1de3b4e074.pdf
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/91ea66.pdf
    • https://cdn-cms.f-static.net/uploads/4416928/normal_5f96de8923e93.pdf
    • https://rulafusojuxibaw.weebly.com/uploads/1/3/4/2/134265871/4295017.pdf
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/2f4d3180c3baf58.pdf
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/rupifetigut.pdf
    • https://xisevulatunetu.weebly.com/uploads/1/3/4/5/134595014/dasuvamor_dubonepukifiwi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/02e77818-3687-4460-b836-f1334fd2fbf6/goneput.pdf
    • https://s3.amazonaws.com/mulerux/free_math_worksheets_1st_grade.pdf
    • https://s3.amazonaws.com/voropa/amendments_of_indian_constitution.pdf
    • https://uploads.strikinglycdn.com/files/a6200fc6-3eb7-498a-b972-2f0e5ce1f7df/kubobovadusosole.pdf
    • https://uploads.strikinglycdn.com/files/ce6dfd24-b0a0-4d71-8990-310225877df0/51433587444.pdf
    • https://uploads.strikinglycdn.com/files/9bae4350-9d15-4887-b786-d3b5aca5db5d/16316214597.pdf
    • https://s3.amazonaws.com/tujeviwakirawu/22589602592.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_off0000c90b.bin
a35ea8e4d435a530d9dbd05f74898ed1e63addc51e24116ba4a0eeb44d56ada9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC90B 5340 bytes
font_01_sfnt_off0000db50.bin
1f2cc84dde16223460cc7faa473c59cf5bf49ff8b4bb95dc4ddfc173aca91202		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB50 9928 bytes

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