Malicious PDF — malware analysis report

Static analysis result for SHA-256 463465f213498cf0…

MALICIOUS

PDF

49.2 KB Created: 2020-11-06 03:23:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 59aadaeed7f1ad6a53d8aa074da6fc73 SHA-1: 5f128528c23ae5ba8b2a7971faeb8198841048b8 SHA-256: 463465f213498cf086f8bb80b59c19c99b4fafea9c589031c8c08dde2a5f4036
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs and a heuristic firing for a "Payment redirection / bank-detail change lure," indicating a likely business email compromise attempt. The primary malicious URL identified is https://trafficel.ru/strik?keyword=into+space+unblocked+hacked, which is likely used to redirect the user to a phishing page or download further malicious content. The document body, though heavily obfuscated, contains references to this URL and other benign-looking PDF links, suggesting a link farm or redirection tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/strik?keyword=into+space+unblocked+hacked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377931/normal_5f8e5d9952631.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379744/normal_5f9763b46a1cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377098/normal_5f9583fa64a32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f931a259759d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370275/normal_5f917b5b2d0cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367687/normal_5f87da55b4b89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f8710e425fcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376598/normal_5f951fcedcecf.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/a551426c-46ad-461f-8827-8cb16319ae61/xizuvesoruwivopajojab.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/the_world_s_easiest_game_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/kirulubevuxedad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/306527d5-8b76-490b-b210-2ec699bffa68/44033228603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7509/1614/files/tiwenijazezugunukazi.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_off00006c4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4A 5204 bytes
SHA-256: eac9dd424f4ddbe53761b4d1a155ea8680ac2c81cb661ed21d6c8b9a8f2de164
font_01_sfnt_off00007def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEF 10956 bytes
SHA-256: f1476726257cd8a4ee70a2b3993267d9327fafca63b5bb58f9c9c8d3699f3fdd
font_02_sfnt_off0000a357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA357 16084 bytes
SHA-256: bf5ec4383cdf52cad07d346b2843a66e6085f1f3054c326d01423588993556d9

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