Malicious PDF — malware analysis report

Static analysis result for SHA-256 49960e5617b27990…

MALICIOUS

PDF

46.6 KB Created: 2020-08-07 22:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1967211aac4d965c2a3f6e2888709ad9 SHA-1: 08e1f901a66ad21d63262cf4eb007f147f4c9ef1 SHA-256: 49960e5617b279903bc5e800d2c12f011ce511d6b8e20b0438129648ac9d92f3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL and other links, suggesting a link farm or redirection attack designed to lead users to 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.ru/pify?keyword=paulo+coelho+hippie+pdf+download
    • http://files.eurekasecondaryschool.ie/uploads/1/3/0/8/130874180/4892be4e327.pdf
    • http://files.sameems.com/uploads/1/3/1/8/131860204/9366937.pdf
    • http://files.jenateer.org/uploads/1/3/2/6/132681576/b0d7e3.pdf
    • http://files.threefeatherstheatre.com/uploads/1/3/0/7/130775145/4b327bbf1cb74.pdf
    • https://cdn.shopify.com/s/files/1/0437/6618/6135/files/counter_strike_global_offensive_fps_boost.pdf
    • https://cdn.shopify.com/s/files/1/0434/2644/7525/files/xegagisexelopagewi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6660/3158/files/xifijukusiwazunabu.pdf
    • https://cdn.shopify.com/s/files/1/0439/8075/1006/files/biblia_de_estudio_nelson_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/shallow_copy_vs_deep_copy.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/nuvedemefiduwago.pdf
    • https://cdn.shopify.com/s/files/1/0439/2943/6315/files/vokeme.pdf
    • https://cdn.shopify.com/s/files/1/0429/2296/7207/files/mtg_arena_won_t_update.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/rumonabov.pdf
    • https://cdn.shopify.com/s/files/1/0429/6520/5141/files/zotutugerile.pdf
    • https://cdn.shopify.com/s/files/1/0432/5326/8642/files/viduruxoxifitibanim.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_off00006f9e.bin
358a7c0c4288f55ca6438985d4a72684ee48e3a57c54d871409199c41b254781
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9E 5064 bytes
font_01_sfnt_off000080f0.bin
24d3d9244d9ae4bc45995c93c51aa8714aa889c23c26af4d3b8498f54b189354
pdf-font-stream PDF embedded font (sfnt) at offset 0x80F0 14072 bytes