Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ca1af077626b48…

MALICIOUS

PDF

70.1 KB Created: 2020-12-20 22:51:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f506a8e14fe3f8dc72f30d91de47a579 SHA-1: 98cf63f39e4e89d223776b4f8670e6495f84ebed SHA-256: d8ca1af077626b48c89e7893f15926bc11e57892c5b388a8441d01dd0a392454
254 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a redirector link and part of an SEO link farm. The embedded links, such as 'https://traffking.ru/strik?utm_term=idle+tap+racing+mod', likely lead to phishing or malware distribution sites. The document's structure and the presence of numerous external links suggest an attempt to drive traffic to malicious infrastructure under the guise of providing content.

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://traffking.ru/strik?utm_term=idle+tap+racing+mod In PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/febujuluxe.pdfIn PDF document text
    • https://fuvekusegubo.weebly.com/uploads/1/3/4/7/134736786/pufali.pdfIn PDF document text
    • https://viwifigejemi.weebly.com/uploads/1/3/0/8/130814408/jigorowidusigu.pdfIn PDF document text
    • https://dapamokosow.weebly.com/uploads/1/3/4/3/134337633/3438380.pdfIn PDF document text
    • https://siwizapetodid.weebly.com/uploads/1/3/4/0/134041585/resiji-pebatifibanija-mopetebibome-fizomanesifago.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc4c8ea0b6b03258f4e486d/t/5fc8634f2dd5737571b30cc8/1606968143880/text_message_sounds_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/893d73f5-3730-4cbb-8777-95644c36f9e5/72043275281.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1aa8145a8629dc78ff29/1606294184532/69724034308.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1503a78-5a7d-48e2-9fb2-0b4cd490f24f/7930473818.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfeb102bbd74065800e14d/t/5fc2254f61e25426e1809f34/1606559056356/zovebigisujosorigoza.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc365b19698b02c7f308a77/t/5fc5daecbc819f1cf4a38f56/1606802157030/one_piece_cp9_leader.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd3a932dcd53187f1eaf8b/t/5fdd5a1d1c66f52f5f712efd/1608342045630/butterfly_life_cycle_worksheets_for_preschoolers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9ea1032-a1f4-4ae6-9bdd-58f27abffb86/bowie_movie_theater_richmond_va.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b6964bb-2f5a-4c72-984a-2878ff873adb/honeywell_xnx_transmitter_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c556a394-4f3b-4f81-b2cb-6dae46318925/dosegojalaj.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE1E 5152 bytes
SHA-256: caaec6172b33fba6e0e3f55f5e3d48f805896233a07e6dbec1066047997776b9
font_01_sfnt_off0000cf90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF90 11200 bytes
SHA-256: 72ccb0358bfb7daa6ae3dd11e9df3a1b550fb4ebe687e75766d249c3791cfb6b
font_02_sfnt_off0000f50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50C 16132 bytes
SHA-256: 2def80ee9cf871b89fa1821d83521187f92649b88f41053709a5a2c79b3e7c85