Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f22839030e6306…

MALICIOUS

PDF

47.8 KB Created: 2020-10-02 23:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d22977e9ba076ecbf220af88264cc520 SHA-1: 2e22d5bd6911db8d11fc7401fb6885f4c5aaab5f SHA-256: 63f22839030e6306787ffa965915e8121cb04da6434c1602a460876cb4c1a4a8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, 'gettraff.ru', which is likely the primary malicious objective. The document body itself is heavily obfuscated and contains the malicious URL, indicating an attempt to disguise its true purpose.

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/strik?keyword=deontology+book+pdf
    • http://files.krgriffiths.org/uploads/1/3/0/8/130874129/96dffd9.pdf
    • http://fujoji.millbayrvresort.com/uploads/1/3/0/8/130814526/nevano.pdf
    • http://muvodu.coonrapidscommunitystrengthfoundation.com/uploads/1/3/1/3/131380213/310f17419ce87.pdf
    • http://nuzewi.rearfacingtoddlers.com/uploads/1/3/2/3/132303001/51b81e2f5.pdf
    • http://konojag.natashaspeaksrussian.com/uploads/1/3/0/8/130814340/ladasupa.pdf
    • http://zamoxijus.jackclutterphotography.com/uploads/1/3/2/8/132814097/293603.pdf
    • http://puweso.calligraphy-theletteraryarts.com/uploads/1/3/0/8/130813821/ebf74b.pdf
    • http://nefujo.fashionspeaks.net/uploads/1/3/1/8/131856166/81317657fadde28.pdf
    • http://wedovimu.aglimpseofhues.com/uploads/1/3/0/7/130739967/1176205.pdf
    • http://files.anbinhgallery.com/uploads/1/3/0/7/130775668/3018565.pdf
    • http://files.wcsea.us/uploads/1/3/1/1/131163856/mezurimateserumobow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4388/0103/files/cristiano_ronaldo_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/3563/8425/files/68191670957.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8795/files/insurgent_book_online.pdf
    • https://cdn.shopify.com/s/files/1/0436/2692/2147/files/macys_liquidation_department_sales_contacts.pdf
    • https://cdn.shopify.com/s/files/1/0483/6933/6471/files/querido_john_descargar.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_off00007b0a.bin
17cb54fed58e8907d64c821e11a3d16417399f462e44e9fb65d9f8af2ee97632		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B0A 5032 bytes
font_01_sfnt_off00008c50.bin
b5db6cca172c4314445a2187f21adecadddbb09c4ddfeb72c09537d80f834302		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C50 11416 bytes

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