Malicious PDF — malware analysis report

Static analysis result for SHA-256 335063858e2a561c…

MALICIOUS

PDF

66.5 KB Created: 2020-12-19 01:03:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8c2536426559ca2e339261ac44ed1a38 SHA-1: 3b37fbc4b686fffd6bf2f4c33d3561771ec443b7 SHA-256: 335063858e2a561cec9378b8c0130c9ce78095a2f63a0b2dabd839648f61fc82
102 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to known malicious redirector infrastructure, specifically `https://cctraff.ru/aws?utm_term=teleprompter+video+creator+pro+apk`. The document body, though heavily obfuscated, contains text fragments suggesting a lure related to software downloads ('Teleprompter video creator pro apk'). The ML classifier also strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://cctraff.ru/aws?utm_term=teleprompter+video+creator+pro+apk In PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/c5440036914bd35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367286/normal_5f9f3de8e1606.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/7184d60a-1b6f-4253-9bd1-4be3fbb6c7db/64850720767.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/936349f8-0016-4604-9ff0-71fcfd5b3526/90297138306.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/google_sheets_count_if_sum.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/farming_simulator_15_trophy_guide_and_roadmap.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/alfa_laval_separator.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd9fec917750a3d7b949/t/5fc25f103570fb44d14fbbb4/1606573841791/53341855729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc67172a-866b-4081-a245-d61df5fbf052/80073542141.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6552ae2fce462bcb0fd92/t/5fd653dbdca22152603fac8d/1607881692625/ant-_4g-_omni-_out-_n_installation_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5bca9239b072291525c9a/t/5fc9adbc87b36f46d4fc2131/1607052738546/9400735219.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/85566464998.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_off0000c62a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC62A 5112 bytes
SHA-256: 02cbf28d35fa4e282f854e0fe2d46922e353e962472218918d6ddb6b7ba94348
font_01_sfnt_off0000d77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77F 11132 bytes
SHA-256: 9c73aecc0075a4585cae7ce0ae676110a50e48ea938cd46cde0723d2308a1509

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