Malicious PDF — malware analysis report

Static analysis result for SHA-256 675e4d8df0bba656…

MALICIOUS

PDF

86.8 KB Created: 2021-01-05 20:06:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 76b0269318ebb960e5393e3cffcf2ea4 SHA-1: 90c804cd8d942102d4a2a21ac58f32bedac42cbf SHA-256: 675e4d8df0bba65671c52a31e4a4ef40268aaabdb01ab924e130c8c28d732234
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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 'ggtraff.ru'. This URL is likely used to lure victims to a malicious site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector suggests a phishing or malware delivery attempt.

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://ggtraff.ru/aws?utm_term=binomische+formel+%25C3%25BCbung+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/toguvaju/coconut_tree_hd_wallpaper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fd1da3d-bb6b-46c7-869a-d4d1e660d305/vuwupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a17c048a-db81-4fd3-af45-3592ed5a0795/givetugovudavigonotavezav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8b6daa3-4370-4731-9408-f556d5416f6c/vikanipun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c746baa-3295-42eb-b4e1-c96e8bbbb394/54341278106.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/melozamigitozenawuvoreje.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/behavioral_psychology_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/email_template_for_asking_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7492238b-f828-4eeb-9349-858caa2de9a2/56603521030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c59fdd87-f05b-4674-8f17-aeceda28f1c7/silent_night_song_on_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbc64fd4-4567-48fe-b12b-7e7bba32904f/all_marvel_films_in_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10295924-acd9-47a3-be82-8b66514a0f63/tienda_famsa_en_austin_tx.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/23570575190.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6C 5472 bytes
SHA-256: 340b6333a3f280b1aa9c63021e295af245210829b64ca528afc566aa69211bc2
font_01_sfnt_off0000ff8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8B 11772 bytes
SHA-256: 288d0628a21c8300cfc6775e8bbf0eba159c38efe8edc56ca8ca6b83f0931f1e
font_02_sfnt_off00012676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12676 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
font_03_sfnt_off00013476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13476 6692 bytes
SHA-256: 341a74bdf1e324709cd530b518a6d1835013524e582869465096611edaea6a4e

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