Malicious PDF — malware analysis report

Static analysis result for SHA-256 0afef008e64a4eb8…

MALICIOUS

PDF

116.8 KB Created: 2020-12-02 12:00:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7558b777f2a877d25c05f63d9695bf8c SHA-1: 88cad40d709d0daa3a8d8a53d28932a65c1893d3 SHA-256: 0afef008e64a4eb85b7995dc365e3495a02239a329ddcecb6bf6648608b50903
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or are part of a link farm designed to manipulate search engine results. The primary malicious URL identified is traffking.ru, which is flagged as a known malicious redirector. The document body is heavily obfuscated and appears to contain junk data, suggesting its primary purpose is not to convey information but to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffking.ru/123?utm_term=antenna+tv+guide+lakeland+fl In PDF document text
    • https://rugeponejap.weebly.com/uploads/1/3/4/4/134487210/gujepojavoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c6fa90a-4ac5-4ade-a220-00f2d98306ce/educated_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/86888103935.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dde4403f5353fd9590af/t/5fc5637e3f75b16643889741/1606771583530/nubuwazomepod.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/dreamweaver_templates_free_photography_website.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/tuwenuxemamanizam.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/wifoxileveviledudapokan.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/mexuxofosudominamiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e23b8135-d71b-4eb7-b7a7-3bb40fa40af6/51141753038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e9563e7-9590-4241-a3e6-e726af453d03/28003750942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7231739c-90d9-4cc8-b300-4ce6c809e3ed/shotokan_karate_heian_shodan_kata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4c3090-68e8-44ec-a394-369e49d691a2/kpn_ka_yzeyi_vardr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f3e3620-5cfb-49e3-a074-9e011cffac33/54754839385.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_off0001896f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1896F 4912 bytes
SHA-256: ceba885a9a08baac3765bf9763bad6a0469ca72b942b9cbfad9253187e05059c
font_01_sfnt_off00019a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A4C 13824 bytes
SHA-256: 98f27a9da16e7b6eb6127af9db1b4a0c0d08ea75c2a2c260121de45bf2a4b151

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