Malicious PDF — malware analysis report

Static analysis result for SHA-256 966a4456488c5239…

MALICIOUS

PDF

47.9 KB Created: 2020-07-31 14:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4631ac09ea12e1146f4fa6f608d91e21 SHA-1: f0c366f4fdf7713a4d9e243fc95924e0b031587d SHA-256: 966a4456488c523931b4d5d319883b4388f55b6c68b1e7f6655b7564e2f277a4
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a high density of embedded external links. The heuristic PDF_SEO_LINK_FARM indicates a link farm, and PDF_MALICIOUS_REDIRECTOR_LINK points to a suspicious redirector URL. The document body appears to be corrupted or heavily obfuscated, providing no clear user-facing content, but the presence of numerous links suggests a traffic-driving or SEO-spamming campaign.

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=auxiliaries+and+modals+pdf In PDF document text
    • http://files.kristamaysart.com/uploads/1/3/1/0/131070485/xaxevijuvumoben_vevagisupa_zolugikunuwak.pdfIn PDF document text
    • http://files.mcoemathletics.org/uploads/1/3/1/4/131454316/9566502.pdfIn PDF document text
    • http://files.danoboots.com/uploads/1/3/1/6/131637419/jikexumexu.pdfIn PDF document text
    • http://files.seriesoflight.com/uploads/1/3/2/8/132814138/tanowalusotafilal.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/1/0440/8786/9592/files/bolosebupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1337/3084/files/71794701738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7143/1065/files/82771497448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1572/4456/files/jakid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/mumevumujenisokab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/jewogoramibitazutunokome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lasuzopaxikabade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/jaxuperawivod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4227/4471/files/kipovibetelaxadugawepojon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5344/9365/files/74428095234.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/88197058127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5361/2182/files/75433383775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/faxazapolib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4947/6518/files/pubitezozevesure.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_off00007ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF0 5044 bytes
SHA-256: ad2672a808fb839bab03c30f9788a3e953d1b7c02d2819708989559ba4887457
font_01_sfnt_off000090f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90F1 9680 bytes
SHA-256: 99a0e8abc1e97a6e5cc7965d63fba0a6e577edd96396123c6361540041a3eed3

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