Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f5a5888db1f8f4…

MALICIOUS

PDF

104.4 KB Created: 2020-11-11 03:11:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3f7f92022fe4c0bd5cc04adcd6a67127 SHA-1: b82af86a485ea712811ba11243aa9f050c8bcb64 SHA-256: 00f5a5888db1f8f45c36a5fe3e32c573b7fae6a80648e5b8f1f60b48c99a7251
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm for SEO purposes, likely a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL points to a suspicious domain, trafftec.ru, which is likely part of the malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/aws?keyword=swtor+galactic+starfighter+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392877/normal_5fa54cf76c264.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380530/normal_5f9c1d5e52cc1.pdfIn PDF document text
    • https://molisemopum.weebly.com/uploads/1/3/1/4/131437834/c8d8ab5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461746/normal_5fa587a5bb9ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5fa4a1d5b032d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409123/normal_5f93efb6ccbcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424982/normal_5f987c893e396.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/bf83c4af-4920-41b9-aa29-19aa3eebb505/togetovituzudoluwedi.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/chapter_3_ap_biology_reading_guide_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/flight_of_the_bumblebee_sheet_music_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ffe27fb-c946-40d6-b126-922ef844c2ad/cooper_dfp450w_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/fifamonipazut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3b39725-4956-4583-adae-f97ef5ef211a/76050954611.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/jomiwojug.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_off00015d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D12 5480 bytes
SHA-256: bde6d3146ab25c4f6311cbeb0c256140e69aec96978fcb3ad77db4a5957af981
font_01_sfnt_off00016fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FC1 11160 bytes
SHA-256: 80cf206541781d861ee0638847592e95f99cab0353f7cca6a7f32065dd6e4475