Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f60808ea46b8788…

MALICIOUS

PDF

72.5 KB Created: 2020-12-04 08:20:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f39bc02d244fc00d50170b820f97934d SHA-1: e7bba8a940b3f9b21a0be05aaf8c64f7cf50aea8 SHA-256: 9f60808ea46b8788068adcc20e93885af5b6ce3c8b97f78a22ecafa29a0de8ed
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'traffking.ru'. The document body, though partially corrupted, contains text related to 'Bipolar junction transistor questions and answers pdf', suggesting a pretext to disguise the malicious link. The presence of numerous embedded URLs, many pointing to link farms, further supports a phishing or malware distribution scheme.

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/wb?keyword=bipolar%20junction%20transistor%20questions%20and%20answers%20pdf In PDF document text
    • https://pareruli.weebly.com/uploads/1/3/4/8/134891857/18f16.pdfIn PDF document text
    • https://xukanimuwuvam.weebly.com/uploads/1/3/2/6/132696198/pekakon-xenaku-malus.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/5fc55349be9b6939512836e1/t/5fc9157862f59a2ed5dc35f9/1607013756156/77300034335.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e99a0a2757459be2ef6a/t/5fc3a58e9b1ed035384cb24e/1606657425889/35632417103.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc39171c6229360ecbdae8e/t/5fc8cf7fee804a17a1da561c/1606995840009/tezaxatus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc140152cf09257bd6e62db/t/5fc5b3669ee0f32b8718ec30/1606792040847/influencer_the_power_to_change_anything_book_summary.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e85027a199023ab5619d/t/5fc477462dd96f59187cdc88/1606711112251/the_magicians_nephew_book.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4deb088c99b6d37c0af76/t/5fc97f4cfedaa13a48580c34/1607040848356/difotejij.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4c53eaf37e3b64920dba/1606372436251/university_of_iowa_sailing_club.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cbbacbb-d698-46a7-8375-f3225f168b79/l4_16_sharp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ae98325-2b01-4d2a-9061-e538beb6e3d0/38046371106.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f27ea13a450babf44921/t/5fc45dc0fa04221c71ab427f/1606704578971/how_does_the_nervous_and_endocrine_system_maintain_homeostasis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ebbe5687f52b6b814126/t/5fc97d986a94db17e4860c32/1607040408611/new_islamic_song_2019_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc534b727a199023ad18a8a/t/5fc64dc5cb3e0f577126a073/1606831558883/fight_ninja_shooters.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4d09fa04221c7116b310/1606372633061/mabuli.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_off0000d8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A4 5492 bytes
SHA-256: 1dd6a590659ca3639387a2432efc02a4d3784e5396b523d506e7238a5c7fa08c
font_01_sfnt_off0000eb75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB75 12196 bytes
SHA-256: 88386652c35524017fac2351d7778a8905d3bbf2c9c4a327cd3fc493edbe35f3

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