Malicious PDF — malware analysis report

Static analysis result for SHA-256 c08361c86c14b76c…

MALICIOUS

PDF

40.6 KB Created: 2020-08-06 14:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bca377c09f740dd0293a1e94ef2ec460 SHA-1: 92a7f60cf7b6dfdbd81854d70fafd8bdeed1606b SHA-256: c08361c86c14b76cf0a584f7ddb7dba0286b17f31d40a153bc9eb314e4889c43
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a URL that mimics a Windows 10 update download. This, combined with the PDF link farm heuristic, indicates a social engineering attempt to trick users into visiting malicious infrastructure. The embedded URLs and the document body text reinforce this lure, suggesting the primary goal is to redirect users to download potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.cc/wb?keyword=windows%2010%20creators%20update%20download%20manually In PDF document text
    • http://files.southaiken.org/uploads/1/3/1/3/131379014/9299323.pdfIn PDF document text
    • http://labakaj.wingsopen.com/uploads/1/3/1/4/131482853/burogugigotutez_xivaz_megatufumuj.pdfIn PDF document text
    • http://files.swcpurpose.com/uploads/1/3/2/7/132711999/1d236c5f15f8c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/guia_de_medicamentos_y_para_que_sirven.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8298/0259/files/vaboferu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3596/7143/files/zulugivotosikeworifutuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1326/6846/files/pofijubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/shuttle_badminton_court_size.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9870/9917/files/bijenawotasapexozigun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3016/7203/files/zugawuwubozepikelonatuwim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6019/9573/files/treasure_map_terraria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7929/5383/files/87788999741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/84861713112.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/90298303584.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1574/8253/files/28456916616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/46130051890.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE0 5620 bytes
SHA-256: 8dcf825503db02073e6e14e73637a02524f343fe581fe46f8fe6a00b8390484e
font_01_sfnt_off00007309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7309 9920 bytes
SHA-256: b501c7b43518f33da1454b629a746a2e929583cb42bebbf3179a20721a93f237

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