Malicious PDF — malware analysis report

Static analysis result for SHA-256 10302aefb5867eec…

MALICIOUS

PDF

42.1 KB Created: 2020-08-16 00:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 869c8698a080348be974ba42fd6999d8 SHA-1: 5e525b73b328dc233d0fd84e0f0babc727de50af SHA-256: 10302aefb5867eecfb858a4b5337af4ba2b815104dc6f25a3f7c0d88e4ccaf6f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary link pointing to a known malicious redirector. The document body text, though partially corrupted, mentions 'typing speed test paragraph pdf', suggesting a lure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, many of which are hosted on benign platforms but likely serve to inflate search engine rankings or distribute further malicious content. No scripts were extracted, but the presence of malicious links and the SEO link farm pattern strongly suggest an intent to redirect users to harmful sites.

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/wb?keyword=typing%20speed%20test%20paragraph%20pdf
    • http://zovexona.captiv8designsusa.com/uploads/1/3/0/8/130813834/7c1f13bf4117.pdf
    • http://files.tinstargames.com/uploads/1/3/2/7/132740294/jotilurobu.pdf
    • http://mumame.innovate2educate.co/uploads/1/3/1/0/131070792/jefizebalilejimevu.pdf
    • http://revavipi.gillianshippey.org/uploads/1/3/1/1/131164250/zovedobudosifu_bumoje_mumitum.pdf
    • http://files.nfcfleonardville.com/uploads/1/3/0/9/130969083/8061180.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7213/5074/files/patino.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nakawefefaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/5825/6286/files/51658808445.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5702/files/zowav.pdf
    • https://cdn.shopify.com/s/files/1/0431/9612/1251/files/sebastian_x_ciel_doujinshi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38967404473.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/motub.pdf
    • https://cdn.shopify.com/s/files/1/0428/1932/2022/files/povigalabumidijifunod.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/kitim.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/kitovewimefi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6634/3072/files/bitcoin_miner_free_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7305/files/elastic_and_inelastic_scattering.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_off0000663a.bin
bd1dafeb2a2b35a831823dcd1bad3499760e20c7c7e8aa61b9b0ad30384a0c67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x663A 5320 bytes
font_01_sfnt_off00007850.bin
7524cf82e5a2bc289266c8a7d9ec6628e83b0781442d7afa7726f988ff5e5b5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7850 10308 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.