Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32d1c9b66baad60…

MALICIOUS

PDF

41.8 KB Created: 2020-10-03 02:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e97009b9143088b8bf7c4da27d0f4584 SHA-1: fdbc979b4257990ad7298287778d2a19e4a0d31c SHA-256: b32d1c9b66baad606ab5f3a65fff37b528aa2aa8621978e75328fc6cd2c830f3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though partially obfuscated, contains a URL that matches one of the identified malicious links. This suggests a phishing or redirection attack aimed at leading users to malicious sites.

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://cctraff.ru/strik?keyword=how+to+find+demand+choke+price In PDF document text
    • http://files.davidbarnes-photography.com/uploads/1/3/1/1/131164236/7cec396ece.pdfIn PDF document text
    • http://files.management-star-class.com/uploads/1/3/1/4/131453198/b879ac6ab4f9.pdfIn PDF document text
    • http://nojikefe.xpensivetastemusic.com/uploads/1/3/1/4/131454899/8177061.pdfIn PDF document text
    • http://moweg.hardawayhighband.com/uploads/1/3/0/7/130776716/lifutimetepi.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/1/0440/4704/0662/files/timamigerumuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7091/7282/files/95604906561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8037/5715/files/mymathuniverse_digits_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/946624a4-d789-4192-b2f0-a620f7489c06/gategekujiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60c4688d-aec0-42d1-8596-16f9f6f843dd/xefisoxila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4720a7e8-f224-4e11-9e4b-661ee384d729/96843737437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36c4f545-eadd-4a34-bad0-ce399f2c0bcf/63135059479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9516/7654/files/fufuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2358/7736/files/lelovuzivesitisadijixogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2998/2115/files/flow_weighted_average_formula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0073/6161/files/72542657863.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_off00006590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6590 5304 bytes
SHA-256: 151c311dac80569a8d9a3f197de9180c02fee12684f25bd6181578d846971cf2
font_01_sfnt_off00007781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7781 10316 bytes
SHA-256: a888b2f45f1f555f69274d2dd7ae8adceedc0d57bc57105a8d45abe18c5663e3

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