Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ed119413348a4b…

MALICIOUS

PDF

41.3 KB Created: 2020-08-10 14:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 39c7f00b1a7e5b73e08d079a5e378ad2 SHA-1: 0d44e7054769d82b403441fc541bf0467f31d28c SHA-256: 72ed119413348a4b9c0f7c45fb0c776429e7ae99834e4e6fa7e3cbea06cc8b2d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to an SEO redirector, which ultimately points to malicious infrastructure. The document body and heuristics indicate a lure for free PDF downloads, likely to phish for credentials or deliver further malware. The ML classifier strongly supports the malicious verdict.

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=libro+arqueologia+del+saber+pdf In PDF document text
    • http://files.capriliciousjewellery.com/uploads/1/3/0/7/130738801/9c8adf6845fb.pdfIn PDF document text
    • http://files.venusevanswinters.com/uploads/1/3/0/8/130813885/xadapiru.pdfIn PDF document text
    • http://files.knightprideproductions.com/uploads/1/3/0/9/130969663/kudugujob.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/1/0430/5797/1362/files/44245077082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5804/3797/files/webmd_portion_size_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7927/9527/files/moxulitijizupub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4484/8295/files/5945610343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5034/4352/files/datacion_carbono_14.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/creative_writing_module.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3087/9136/files/big_bang_theory_essay.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/61220144669.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/duzawubemamomavokam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7473/8593/files/gregor_the_overlander.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9578/5629/files/70851008879.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_off00005908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5908 5416 bytes
SHA-256: 3ce30a41ce1cbb67e467b8c45789ce3b90863dddf907081d647387273becc823
font_01_sfnt_off00006b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B70 13856 bytes
SHA-256: 210b739459b23d951ea629daee9466fa75754eaac6500a129e1f4a9545c59fb3

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