Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3b2b34c13883a7a…

MALICIOUS

PDF

144.9 KB Created: 2020-11-03 11:18:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fa70194514d9c2b387a2ed7fa284d2a5 SHA-1: 1c60fcdaadc03c4fb92751a03b220f3fc33ad683 SHA-256: d3b2b34c13883a7a84c1686111ca2a60f1148701667c3ba96b4e54ed40963e6e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the one flagged by the heuristic. The presence of a link farm suggests an attempt to generate traffic or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/aws?keyword=oot+randomizer+checklist+4.0 In PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/4076276.pdfIn PDF document text
    • https://buvejigu.weebly.com/uploads/1/3/4/3/134386374/pegatewagow-kijidul.pdfIn PDF document text
    • https://ranefegol.weebly.com/uploads/1/3/4/4/134498511/3207819.pdfIn PDF document text
    • https://xabopefasuliwik.weebly.com/uploads/1/3/4/4/134445681/9018410.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_5f889c933bc81.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/1/0429/2627/6774/files/xopab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85bded86-3eee-492a-aca8-78c405b3949b/bojuda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a11b4fd-46f5-45e6-8889-9cfb84563507/divinity_original_sin_2_hexentrank.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a727d469-c01d-4959-b34e-40593e5f8b13/zawuruvavabumiwib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caea099f-39f3-4556-bee9-232134b751b1/80029200046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0197/4425/files/brothers_karamazov_russian_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/469ab9ff-613e-4c32-9bae-89aebdde4511/64249170330.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_off0001f86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F86E 5580 bytes
SHA-256: 2b66146c4e6786e4c8db89485c86ce509c045b838af703b933c3a424c962bd96
font_01_sfnt_off00020b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20B48 12876 bytes
SHA-256: 41312b3163830cffe144f5cdcbeab0973723dd1a3892eebc1df207a5efe0f471

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