Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a52e919063a62eb…

MALICIOUS

PDF

81.0 KB Created: 2020-09-07 11:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5b8a5124ed431221e4ec45c25613aa11 SHA-1: a6ee42bdc8e1aa9863afc38bc7607de71d44e52b SHA-256: 8a52e919063a62eb3e639deee75aa99e9886b0e0f32ce5680c707ec692608b8b
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://ttraff.ru/wix?keyword=kuroko%2527+s+basketball+pc+game+free 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://cdn.shopify.com/s/files/1/0427/9389/4044/files/58833734927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/dupabawabiradorifita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2744/8476/files/que_fueron_las_reformas_borbonicas_resumen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/renoloworokubodoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/kofezabazojowag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/8825/6664/files/arcsight_connector_performance_tuning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1762/3957/files/liwijilefewovojumusutu.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_440114f5513f4854b313b69758118795.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/99a8f2_964b1105562e4187b90d9a3fafabe0e4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e5cbe5_ee896ad1e75b440eba2136f5c7872bfa.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d13e1f_79a7746f1ee6452690d70cd0ac13b1f8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f459ea_54f4912922124226ad2bc786e66c2ceb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3110/9538/files/87431614796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6288/6549/files/46924830763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/kasasidodaxivegorefutege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3258/9989/files/gubevatulukiranujetabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2286/8892/files/idealism_and_realism.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000087d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x87D9 34000 bytes
SHA-256: adff8988862451494310248f016aecc81873ee53dd0741456e384b0f966107fb
font_01_sfnt_off0000f1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B3 5268 bytes
SHA-256: 0222c0d3918961bcc0f09dbec86267d9aa9b55b373b3cc1c2bdbd3f37ad419cb
font_02_sfnt_off000103bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BB 10092 bytes
SHA-256: 0deefab14a316d9a3cbb5d92f0adb25d10fc0ea024f487acce369abd670e7337
font_03_sfnt_off00012657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12657 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.