Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb1f73a4e32fe173…

MALICIOUS

PDF

71.5 KB Created: 2020-10-25 20:41:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ef6ed8c631265176c85ec733cd677c9e SHA-1: 1f853e69cfad5b9d0fd5731461259ae9a2128bb1 SHA-256: bb1f73a4e32fe17382f4b8db7d8faad0bdc848ceb0983c15142e3bca8e530dcb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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://gettraff.ru/123?keyword=igloo+ice+maker+ice103+manual In PDF document text
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/1ce0597.pdfIn PDF document text
    • https://bewupoterefi.weebly.com/uploads/1/3/1/3/131380107/fesesosobo-wafofomatajimet-nigujalozimala-sipenop.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/6443274.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/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
    • https://uploads.strikinglycdn.com/files/9a152250-4c33-4bb8-b8f3-7c6309868805/63732357254.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/065f291c-6fc8-4956-a17f-9d1ffe67687d/getavubuxolobifaloduwazum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae574163-5421-4748-bd94-eee1a3f50cd4/antrenmanlarla_matematik_1._kitap_pd.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/53297085401.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/adobe_acrobat_pro_dc_scan_to.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/letimubonefuvanutunokor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f6d1e6e-a928-4462-956c-f26a484aa81f/32084919248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1241a467-1e26-4dd5-bd94-ac3a8f8485ae/wiranoxajirawaxidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9e50f44-62c0-4d1b-b4e9-27f4d831e39e/joel_osteen_libros_en_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d1a9641-7efe-403d-9f45-ca5e96573238/tadodedebedav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b40457e3-f261-467f-982e-8d6dff3a957c/lijur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b3fd613-a74b-4214-932f-d6d84882af2e/fijaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f090370a-810c-4e30-88ec-6ca5d6f1c6e0/momimukuwexidixob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64d8b5b1-869e-497f-81ab-acc62644d5b3/lenin_para_principiantes_rius_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68ae36c6-bdeb-4606-9f51-4fdcbd0140b8/misli._com_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71674b32-e769-4698-9da9-13f0a8924324/97829330021.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aa1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA1B 1528 bytes
SHA-256: 64d53b4318ba7dc869bcefe2c6c56431e6e12bcaf96a32242cfa9e17b755ba3b
font_01_sfnt_off0000b1e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1E3 5104 bytes
SHA-256: 1f1f53d0dd2f085d14ba287e8505e07e5a2b0d10ebc5e249396bde30ace72565
font_02_sfnt_off0000c319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC319 12536 bytes
SHA-256: 89f3ff47e39963d4d71beeba0112f40a9c1aac4acd4a43c603d9257390d64b7d
font_03_sfnt_off0000ec85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC85 16232 bytes
SHA-256: 6312c60c59b705e9eea0cce2691d26efee8000c36347b0aec776c30464574248
font_04_sfnt_off000101e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E0 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2