Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fa1c61b9c0c83e5…

MALICIOUS

PDF

57.2 KB Created: 2020-12-18 06:00:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: a75a2ac74a6230bdbaeea1a87409935c SHA-1: 19d4059293a8db50e2f72eca58aa38034c487769 SHA-256: 1fa1c61b9c0c83e5ff2b23ae35e7c253d2352c460ce6e5772b5aa92777f17a8a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffking.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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=frigidaire+gallery+series+oven+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4497368/normal_5fbfb2c3b22fc.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/1b20d047-70bb-4f10-ba0a-6d6d31303828/sogunoserobugisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b7840ff-6582-47d2-93eb-0363af2bc86a/knock_knock_orange_you_glad_jokes.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/storm_s_end.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/805088c3-6b0b-4f64-9cfb-a20101b22894/a_mother_s_reckoning.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc350c32e537a05ef18a0f9/t/5fc6c2470791337046cdf58c/1606861384421/26635353667.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/minecraft_apk_pc_free_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/lufthansa_a340-_600_first_class_trip_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c3ab303-b1e2-4c2f-a145-00e6902eb6f4/tesirefuxirawajewal.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/pegewonebulow.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/samsung_s8_android_10_custom_rom.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_off0000a5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5FC 5260 bytes
SHA-256: 3645c326da0ff351ec524a943fd73d37ce8df7e7823c67d10a110d9c9d37f7b2
font_01_sfnt_off0000b7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7DF 9548 bytes
SHA-256: fbd286ac3cda6753616c5a07bb6e53eba7f61bfbff2f4fd3798c2640d2310e73

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