Malicious PDF — malware analysis report

Static analysis result for SHA-256 91d39781f15d5be4…

MALICIOUS

PDF

43.7 KB Created: 2020-08-13 15:39:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cc46a450b14ce1dc669deb01816f3d11 SHA-1: 9759e7ca9c9f6470d3f61bf18206fe3fe6e75f10 SHA-256: 91d39781f15d5be41670509fcdce479d6ad9a31f10d60a3c10f4001fe16a89e3
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and references to the embedded URLs, suggesting an attempt to lure users to malicious content. No scripts were extracted from this sample.

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/pify?keyword=hebdomada+aenigmatum+pdf In PDF document text
    • http://files.shuckinfun.com/uploads/1/3/2/8/132814387/wawipib_mugonatezebekax_vidanebaz_tagasawasifeji.pdfIn PDF document text
    • http://pejirumix.elkgroveketocorner.com/uploads/1/3/1/8/131856543/sutekojefe.pdfIn PDF document text
    • http://files.englishtheatrecompany32.fr/uploads/1/3/0/7/130739802/nofogasemomupe_jemeluxetav_fuvuko.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/1/0440/2744/5413/files/gogunawusenof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1385/7692/files/sagotinilupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3664/7317/files/98771319427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/70144406983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8105/6935/files/female_foeticide_and_infanticide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5759/4016/files/66589843539.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8152/1569/files/63922947299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/3943/6449/files/85542787960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/vixizipola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7103/6822/files/27036649258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2871/6439/files/29494062819.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0800/0163/files/11607162825.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0813/1233/files/46496927258.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 6

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_off00006770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6770 5156 bytes
SHA-256: f8771068c3e3a422c044230a493ad39670966157a71bc9740a3441f265093e66
font_01_sfnt_off000078e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78E9 12552 bytes
SHA-256: fab9950a69c68e17ed12e4aee121f2891edced2d8c567dcbdfc4bcb28a8372ec

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