Malicious PDF — malware analysis report

Static analysis result for SHA-256 9158cae180d6713e…

MALICIOUS

PDF

44.2 KB Created: 2020-08-11 07:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d30f86edf67c2371f76953b81182420f SHA-1: e8a86b3390798ffeb1c01b195a0432a6c37e3404 SHA-256: 9158cae180d6713e2dbbb5bf2a307bb636ea09027c5d93157068b341ea6426f7
202 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain the same malicious URL. The presence of a 'download button' heuristic further supports the lure of clicking a link. The file's purpose is to redirect the user to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=requirement+elicitation+and+analysis+in+software+engineering+pdf In PDF document text
    • http://files.unitedpublishersofarmidale.net/uploads/1/3/1/3/131379719/ae056e3b.pdfIn PDF document text
    • http://files.nourishingacres.com/uploads/1/3/1/4/131453215/zefadodukenoju.pdfIn PDF document text
    • http://files.ibisregalia77.com/uploads/1/3/0/8/130815026/wijimomabem_zumenisev.pdfIn PDF document text
    • http://files.mtunionchurch.org/uploads/1/3/0/7/130739826/3541063.pdfIn PDF document text
    • http://files.ryanshowland.com/uploads/1/3/2/7/132740978/7f7245a6b279f9a.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/1/0429/0704/1959/files/9209324383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/49803074334.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0242/9593/files/45816468451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3240/4380/files/35904848542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1119/3501/files/syntax_score.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6863/7862/files/tifegireponebikibanovejop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2609/6036/files/susipenofad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5261/4311/files/xumuwuwerani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5122/1146/files/77580752166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70998441087.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0266/6906/files/ramitulawopuwop.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 8

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_off00006d71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D71 5800 bytes
SHA-256: 3f23cdabcd867b4dfbe7bdbdd76d1d8ca2eca545bc079160fffbcfaa5d6e243a
font_01_sfnt_off00008136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8136 10156 bytes
SHA-256: f7d0ec5fdcc6612b3cbcc9ede1e4e71cd401a8ac7b66cc72d438768d7f091671

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