Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff6dc923e1b7eda8…

MALICIOUS

PDF

68.1 KB Created: 2020-12-19 08:52:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0e86fd7617a4ed03480a3c7aceacb155 SHA-1: a9ec92c78f8873b69eebf21970b53303f735239f SHA-256: ff6dc923e1b7eda8e6f11bb63bc491ac449ebdff72cf2ddb75ed3a9ad0f20c2b
214 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure and a high-confidence ML classification. The document contains a large number of embedded links, suggesting it's part of a link farm or phishing campaign. The primary malicious URL identified is 'https://traffking.ru/123?utm_term=liquid+silk+wrap+for+nails', which is flagged as a redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=liquid+silk+wrap+for+nails In PDF document text
    • https://wejerimaz.weebly.com/uploads/1/3/4/6/134648800/7de7d9.pdfIn PDF document text
    • https://norusukesalija.weebly.com/uploads/1/3/4/3/134356509/6577127.pdfIn PDF document text
    • https://govonomuvilikiw.weebly.com/uploads/1/3/4/6/134620083/zujorubonovu.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/rotowan/wheels_on_meals_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/xatujakogotutodaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9a442d6-bc81-4d08-a2c8-c1a674eaedc7/46970467251.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c5fa405d5340f34b1f29/t/5fc84c4046ef2e08cbb10d34/1606962240403/22992885917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8088dc44-159e-40ec-a1c4-e237dc7f692d/dibujos_de_los_reyes_magos_para_colo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28a8211f6a41984901fa4/t/5fca86d48e8fba586e63017f/1607108308631/banana_kong_game_download_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28fbed26ff1194f7e5808/t/5fc489fbf81c9a2a0c3365c2/1606715903342/figitex.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/torrent_adobe_lightroom_cracked.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4cd6a97599144eedb59d/1606372567461/the_supreme_in_supreme_court_icivics_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0e86ded-6b86-4f26-907b-9e4d1b1152ce/uncle_ato_mensuro_lyrics.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c1729955c744b53acf23/t/5fca904987ceb843bddfcb04/1607110729832/fepaleparazipuwaxa.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_off0000ceab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAB 5260 bytes
SHA-256: dca32e28084727708056b294f32361f64ed402eb7b388ec79e8e4032d7257d99
font_01_sfnt_off0000e0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B6 10276 bytes
SHA-256: 5dd80b91dca207bc567d6a1deed6ab450bc576b0e599bb0c11d17ccc5a1b4674

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