Malicious PDF — malware analysis report

Static analysis result for SHA-256 c373d428deb090ef…

MALICIOUS

PDF

41.0 KB Created: 2020-08-23 22:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d31fa3c3cf845f2b4ee24b3b3fa8822b SHA-1: 9371fbde0cf4c3de3a0924a83ef96cba57428d01 SHA-256: c373d428deb090eff91d42321c2452f5e32e05a6b314364f5b47982c731a75e3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a prominent link that redirects to a malicious URL, disguised with keywords related to software downloads. The document body and embedded links suggest a lure for users seeking software, which is a common tactic for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=spotify+premium+apk+pc+windows+7 In PDF document text
    • http://files.pureholisticharmony.com/uploads/1/3/0/7/130739490/zisivotelesubun.pdfIn PDF document text
    • http://files.uplift.ccsdtitle1.org/uploads/1/3/1/3/131379894/puvefa_jaxafutilidawin_wegepalevolof.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/1/0434/5911/7206/files/sales_forecasting_excel_template_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9054/2741/files/720p_vs_1080i.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5989/4682/files/pobila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0026/5878/files/webiketusuzosasaverig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2659/3445/files/answers_in_genesis_book_of_enoch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6795/5610/files/ruby_subtract_arrays.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6244/2646/files/tadegodonedovuzunageso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8832/1435/files/divitasazilulonudorotepas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5109/6984/files/8781174230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3914/2566/files/57429975431.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 7

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_off00006142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6142 5712 bytes
SHA-256: 1e8d8e7cb542a6b0f3164b9ef55873d1d28da8b6b1313b490ff163316b4ed0a7
font_01_sfnt_off000074b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74B8 10268 bytes
SHA-256: 97716826cc8063b7c68db0e4de4e9a22fd885aa53390991d32ae67536e00d63e

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