Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f4c93434da58853…

MALICIOUS

PDF

80.6 KB Created: 2020-12-28 08:46:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ddf4e9c31807cca91e2dfe6a7439f055 SHA-1: a9b30fa7e9a85f7a3fd885aa8952c2accd523be8 SHA-256: 6f4c93434da588537d71cf180f53c6e0fbb0e76a5e233f464f5ecc60896abb3b
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a redirector link to 'gettraff.ru'. This indicates the document is designed to lure users to malicious sites. The ML classifier and ClamAV detection strongly support a malicious classification, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/strik?utm_term=pottery+barn+teen In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369506/normal_5fb441ef606f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382778/normal_5fafbfe534f8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470399/normal_5fe8363a8fd9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377102/normal_5fbf1f7c7eb60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478131/normal_5fc837594edf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402267/normal_5f9edbe685ae8.pdfIn PDF document text
    • https://jasidixivogejo.weebly.com/uploads/1/3/4/7/134749747/xawisudajazez.pdfIn PDF document text
    • https://gabofulonu.weebly.com/uploads/1/3/4/7/134730366/210f13fbbac7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386080/normal_5fdfcb7a251b1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/brothers_osborne_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7dbd98e-d2f5-4aca-a0a3-ccdea5d1448b/kapiolani_community_college_map.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/91465170952.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/free_movie_bajirao_mastani_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/48344833810.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/bhojpuri_song_dj_2019_remix_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/unlock_att_galaxy_s10.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/bonetrousle_remix_free.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_off00010035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10035 4712 bytes
SHA-256: 2974f44446ab85ca780afc69d330686f62bc826a9bd5e3c134a36b4f139409a2
font_01_sfnt_off00011050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11050 11068 bytes
SHA-256: 22fc787b1f9d89992595c12dc0114487db1393ab492a096c32e0d92741a22c0e

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