Malicious PDF — malware analysis report

Static analysis result for SHA-256 1665115a325520ac…

MALICIOUS

PDF

44.9 KB Created: 2020-08-08 23:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b12521f089bd508ccefacbcd079d57f8 SHA-1: b01b5685f38ca1599b99aa49d59a348a003e85bc SHA-256: 1665115a325520ac6b7231969d712c7d2bc327c40f6dbf3218c39f413f9286b6
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as configuration guides, redirecting users to a malicious URL. The ML classifier strongly indicated maliciousness, and the PDF structure includes multiple links to external resources, many of which are hosted on potentially compromised or malicious domains. The embedded content, while appearing as document text, contains the malicious redirector URL.

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=asterisknow+configuration+guide+pdf In PDF document text
    • http://files.sentinelhealthshield.com/uploads/1/3/0/8/130813528/pemerokemomodofu.pdfIn PDF document text
    • http://xezifuxi.nicolenaro.org/uploads/1/3/1/4/131437987/526d99109.pdfIn PDF document text
    • http://files.citylimitswestern.com/uploads/1/3/1/0/131070539/sabupuke.pdfIn PDF document text
    • http://files.prestamoscreditoetc.com/uploads/1/3/0/7/130740442/11be9a0a2a32e.pdfIn PDF document text
    • http://files.mojofinancialservices.com/uploads/1/3/0/7/130739340/1180215.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/1/0428/4101/4438/files/63287627191.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7339/5106/files/eye_glare_meme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6750/6849/files/misupaguzibowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/65439774558.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5278/5055/files/fasuxorijuzupokovevazewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2277/7496/files/84562978724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/2025727977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4686/8891/files/jaludipetolejikadefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/jspdf_autotable_rowspan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/98204411980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/taselalodomojobuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0277/3156/files/tamonewuzelemazivu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2754/5763/files/6892569013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0762/2817/files/temikanugotadarimoxomeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1400/2587/files/entrepreneurship_development_book_by_rajeev_roy.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBC 5436 bytes
SHA-256: 5c56d34d82a5123f5b9ae59380b40b07c37dc8d0392dc4659ae371b916070f8d
font_01_sfnt_off0000816d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x816D 10712 bytes
SHA-256: 75d527a0c9b99454f55919e8567b0b1821c781f682d677bea62b0f78a8952e89