Malicious PDF — malware analysis report

Static analysis result for SHA-256 248f120029277b6c…

MALICIOUS

PDF

41.3 KB Created: 2020-08-23 16:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a6bf829b6427a09b847d6b9f08fcfac SHA-1: b12f479e4749234e885b104cd4b0c1213f8a8b86 SHA-256: 248f120029277b6c1856513681e2a0be0f09bc297f17a93eb077682abc9645b4
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify, but one critical link directs to a known malicious redirector. The document body text, though heavily obfuscated, includes the URL for the malicious redirector. This suggests the document's primary purpose is to redirect the user to malicious infrastructure, likely for further exploitation or credential harvesting.

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/pify?keyword=board+delegation+of+authority+template
    • http://winunifi.jlinco.com/uploads/1/3/1/4/131453526/bugawinetevuxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/3750/7240/files/13580817204.pdf
    • https://cdn.shopify.com/s/files/1/0438/1884/4322/files/baharo_phool_barsao_gana_video.pdf
    • https://cdn.shopify.com/s/files/1/0429/7110/3395/files/data_analysis_excel_2020_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/6426/2818/files/biological_nitrogen_fixation_process.pdf
    • https://cdn.shopify.com/s/files/1/0434/5623/3638/files/fatijoxevolirux.pdf
    • https://cdn.shopify.com/s/files/1/0430/4060/4314/files/funubevanixurefikugabud.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9638/files/tokopin.pdf
    • https://cdn.shopify.com/s/files/1/0433/6589/2245/files/cartesian_coordinate_system_grade_8.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/xepogu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2987/0230/files/wasujek.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000648c.bin
2a7685809f5303b2f6285aa18bf97186b18c951d6fbd03a0a7a48781f159aa16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x648C 5428 bytes
font_01_sfnt_off000076df.bin
18b6a83ff7006e6a1f63decafe2e7b7bc565021f6c3bfcc9b263a1e09ed7a604		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76DF 9884 bytes

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