Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ce8051818b9231…

MALICIOUS

PDF

40.9 KB Created: 2020-08-29 23:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 501120588a0a487b5400862854e3661c SHA-1: 45e3bb0f34554898ac96fcb71b22e3258dbdd726 SHA-256: 62ce8051818b9231493158f5c3cb5d5a64de318ac7c8b7fe5d7aa528d99a4ca5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged as malicious due to a high number of embedded links, with one specifically identified as a malicious redirector. The document body contains garbled text but includes the malicious URL and several benign Shopify URLs, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, supporting the attack pattern of redirecting users to potentially harmful 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.ru/wix?keyword=icons+rpg+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0460/5617/7819/files/combine_multiple_excel_worksheets_into_one_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70277109097.pdf
    • https://cdn.shopify.com/s/files/1/0433/3882/5887/files/67601282892.pdf
    • https://cdn.shopify.com/s/files/1/0429/6510/6847/files/945885979.pdf
    • https://cdn.shopify.com/s/files/1/0437/5032/6426/files/9709007233.pdf
    • https://cdn.shopify.com/s/files/1/0440/7299/2918/files/41995220069.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/82732967634.pdf
    • https://cdn.shopify.com/s/files/1/0431/7780/3931/files/amina_al_mufti_book_somali.pdf
    • https://cdn.shopify.com/s/files/1/0429/5757/0207/files/38250630207.pdf
    • https://cdn.shopify.com/s/files/1/0433/7677/1224/files/dmv_manual_ny.pdf
    • https://cdn.shopify.com/s/files/1/0465/3986/6270/files/63897589602.pdf
    • https://cdn.shopify.com/s/files/1/0436/4913/8846/files/52164091372.pdf
    • https://cdn.shopify.com/s/files/1/0433/7962/2040/files/resonance_2018_answer_key.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062e0.bin
dbe9a12354577af3ed369f9de6244f256611ead48715f811d6305cdcb3350c97
pdf-font-stream PDF embedded font (sfnt) at offset 0x62E0 5016 bytes
font_01_sfnt_off000073f6.bin
64be5520e205f0f6c4d727054ae171b3ffc8e230713c524cbb9b99dd306307ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x73F6 10288 bytes