Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9e5c2683e3fb3b3…

MALICIOUS

PDF

36.8 KB Created: 2020-07-29 11:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e6281a7f365e32793dea80519b6e9915 SHA-1: a29540c21e4355d766a0bae4d50b2c9711c0497f SHA-256: c9e5c2683e3fb3b3af6af9ca272dba56a1533fdb39d64095f0ba8176091daa83
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, and 'PDF_SEO_LINK_FARM' indicates a large number of external links, likely for SEO manipulation or to obscure malicious destinations. The ML classifier strongly suggests malicious intent. The primary attack vector appears to be luring the user to click on a malicious URL disguised as a PDF.

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.ru/pify?keyword=shell+advance+ax5+pdf In PDF document text
    • http://files.suncityhoa.com/uploads/1/3/1/4/131437671/1853841.pdfIn PDF document text
    • http://files.murraywoodscuteachingportfolio2020.com/uploads/1/3/0/7/130739116/vupex_reziregunarabu_fadomojeju_sizozavovudiret.pdfIn PDF document text
    • http://files.marinwoodturning.com/uploads/1/3/1/0/131070572/gofuromo_mosemiva_sekafexemitir.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/1/0431/9812/0096/files/15445027540.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9275/5103/files/6548860022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7367/4142/files/jorisiwunarupesepemenu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7270/6977/files/fasufufufikuginulupomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2440/7961/files/nunusokupizunejupewevifig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8059/7152/files/xuzuditetavusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7329/6801/files/lozidifemum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4351/2732/files/97187865642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6807/1836/files/6522027214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6090/1528/files/76116686761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0453/4692/files/90421899562.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_off000055f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55F2 4872 bytes
SHA-256: 2ebe910e4fcda39075862b714f0c40b6420033ba412b2855f4cde7ecd222c9e4
font_01_sfnt_off0000667e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x667E 9336 bytes
SHA-256: 9a77d1a4569c32b6a42c0a5fc49fc5fb9f8f65072d7fcaf157983fb010a68432

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