Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e06b8dd324e6e3…

MALICIOUS

PDF

201.8 KB Created: 2020-08-15 08:41:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d0fd5a66dad7508f5b124365e7aaab90 SHA-1: d00e6cfc15d0d8563f78f14b4384e28d8d04cc45 SHA-256: 99e06b8dd324e6e37d3d53007e04eff0de9909168c2cdbe0a2f6d30a71feb38b
94 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 'https://ttraff.cc/pify?keyword=lupus+testing+guidelines'. This URL is embedded within the document body, suggesting an attempt to trick the user into navigating to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious URL is sufficient evidence for a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 3

  • 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://ttraff.cc/pify?keyword=lupus+testing+guidelines In PDF document text
    • http://files.mountaindreamer.net/uploads/1/3/1/6/131637477/cbbe11fbf426be7.pdfIn PDF document text
    • http://files.fishinginnovationsnrv.com/uploads/1/3/0/8/130814611/xoraxe-rafekoka-tamivewubitawez.pdfIn PDF document text
    • http://files.travelfarther.com/uploads/1/3/0/7/130775645/wopeximupefawasolire.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3483/7149/files/mufazegagunuwalodugogut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/toxuwudisomajonuva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5239/9773/files/tisemotumowuzatisipes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4116/0344/files/94623531697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9449/9743/files/infosys_aptitude_questions_2020_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8542/0949/files/facebook_brute_force_python_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8348/9687/files/jesowigekijipipuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5082/6919/files/agamemnon_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/55292225529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5376/8090/files/comment_couper_un_document_en_plusieurs.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002c44a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C44A 4760 bytes
SHA-256: fe172490ae9ba551617321edd48efda52bec6a9b3e3d16d77b24651af8a3beb3
font_01_sfnt_off0002d48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D48F 14616 bytes
SHA-256: 0b4ecdf1f16ccfd51be242c0498c91e565e9535d24fb8a528111006738a8af4e
font_02_sfnt_off00030311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30311 16272 bytes
SHA-256: c6f9f0fa34c9d7a8d449efa66bf771f8fa3a7f94bc781901e79ac11813a92c76

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