Malicious PDF — malware analysis report

Static analysis result for SHA-256 2205bc5acf2ae30a…

MALICIOUS

PDF

50.7 KB Created: 2020-10-31 20:44:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0f1607246b2e88685858a14057918384 SHA-1: 7596b2cb1c669f27501fe4af49faaa5cb988f88f SHA-256: 2205bc5acf2ae30a66529e7fff7faa0780a19aae103d05ad7a655fe3c0afa353
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector's target. The presence of numerous other PDF links suggests a link farm or SEO poisoning attempt, further indicating malicious intent. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=alone+orphaned+on+the+ocean+movie 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/e70e5251-a929-4c8f-9ef9-76601c0da7fa/doremowigavole.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/92397170904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/863a5859-71a2-4480-8280-fbf301996e4d/7889983331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aa3c33f-44bc-4aa0-90b1-a8df3d38aaa0/famudilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a80820c5-8d21-4e51-a769-2c07091095bb/zijudiwotikunotunur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9898/7414/files/70439204325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2ac7a55-e1d6-4848-871f-33de2f0cc4dc/63142963105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/32524114449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4603/4330/files/moca_assessment_tool_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/2473/3124/files/jukabububusatido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/1219/6005/files/brimless_hat_meme.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/doboliwigewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4142/8918/files/56136315106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ae8813b-a345-4342-83b4-113890f258b7/jidob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/099bb17d-0811-4b1e-9d00-8d3d690e7285/13562579565.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9808/4006/files/65670532799.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D8 4972 bytes
SHA-256: 3b5a1bf1cdf190ab614ae5613f730533cd90c96319f90b2c8f064b199be2da32
font_01_sfnt_off0000758b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x758B 10884 bytes
SHA-256: 4c3b11035e66a459893fba925413e5ca4f5ff62061cd6756592d4e50598a28cc
font_02_sfnt_off00009a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A48 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
font_03_sfnt_off0000af76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF76 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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