Malicious PDF — malware analysis report

Static analysis result for SHA-256 61384ee93c00da06…

MALICIOUS

PDF

56.8 KB Created: 2020-09-19 17:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38907cb834349d7b9d9d6889edf24bdb SHA-1: a9c2912b878fa3de8c8d3eb9688f5012045a3a2d SHA-256: 61384ee93c00da06733b7bcfd2ead6b2b3a489445f39a05a5b4f4b4c733aee0a
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The presence of numerous other PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content.

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.link/wix?keyword=persepolis+main+characters
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7077/4693/files/remudobuvag.pdf
    • https://cdn.shopify.com/s/files/1/0482/9547/7410/files/news_template_premiere_pro.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4515/files/87931751079.pdf
    • https://cdn.shopify.com/s/files/1/0432/6011/7160/files/13170905187.pdf
    • https://cdn.shopify.com/s/files/1/0428/9373/8143/files/side_effects_of_antiepileptic_drugs.pdf
    • https://98ece2fc-3500-40e7-919d-d2c1d9302eba.filesusr.com/ugd/1f6d71_4bf6d2abff724f028dccd2ad810dedec.pdf?index=true
    • https://401f5285-4c14-4740-bc21-ad4684ebbebd.filesusr.com/ugd/0d002d_6cf14393520549d8a8d1e7a62c879701.pdf?index=true
    • https://fc7184da-2dc3-41c7-a0c6-a4cbcc862cda.filesusr.com/ugd/db93e9_979a82bfdeb64328b84474f25cdff69a.pdf?index=true
    • https://6b4d3051-b43e-4c02-9c03-a124fc9f15ab.filesusr.com/ugd/83d902_02812018db464c02aa256d724ca820ae.pdf?index=true
    • https://2042d025-4e1b-4691-a17b-4ea51d9f22f5.filesusr.com/ugd/11b39a_b17f4526a4e44b25bf525dc24666328c.pdf?index=true
    • https://e2b9fb29-8f39-43a0-9252-dafb3d3ffb1d.filesusr.com/ugd/062c90_3b0851e52cb348a8a45b75353aaaffa8.pdf?index=true
    • https://bd91bbfb-bef7-4dd6-b0b5-807c612a3dc2.filesusr.com/ugd/1d64af_5d900307c9d84fcfac21654ada1be6e4.pdf?index=true
    • https://754d11cd-56bf-432a-b693-bbf9a51e5cc7.filesusr.com/ugd/de02f3_ab12c3a4189a439f840e70e67fe2d1a2.pdf?index=true
    • https://712b9b2d-696c-44b8-b407-0ea0af78515f.filesusr.com/ugd/a4ea6c_1aeca9e9c9d149ddafc823d0073fc23b.pdf?index=true
    • https://853b63e2-5d96-40e4-9644-b087bd78e544.filesusr.com/ugd/afe78f_6415c1195b534099b432a218247c8f01.pdf?index=true
    • https://72c2bb2b-ed01-4af3-9791-f87a2d598a7a.filesusr.com/ugd/d93890_7e3e071e948c4707ad0d3783e8949499.pdf?index=true
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a00b.bin
399b9eb53b4c6b8c995d095f64a89ba3e6c11b2ad313d18939eb99c2b9cf142e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA00B 5176 bytes
font_01_sfnt_off0000b171.bin
fd237031d0416f191ea85bca116befa3cd3dab16a25325ad8d982f7c7cb83871		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB171 10772 bytes

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