Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8ffc4ffbead89fa…

MALICIOUS

PDF

50.2 KB Created: 2020-07-29 13:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dc06fa25912484993d74359055a3966a SHA-1: 482f974a2da127468215fbd34ec59b8231af06af SHA-256: b8ffc4ffbead89fa51be1cc1acabc02ea46894bcfd4ad63544408024f041ef92
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links to external PDF files, many hosted on Shopify. One of the primary links redirects to a known malicious redirector. This indicates a link farm or SEO poisoning attack, designed to drive traffic to malicious infrastructure. 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.com/pify?keyword=a+multivariate+model+of+strategic+asset+allocation+pdf In PDF document text
    • http://files.drlouiefrodriguez.com/uploads/1/3/0/7/130775387/tonixegolak.pdfIn PDF document text
    • http://files.mysticsilverglass.com/uploads/1/3/0/7/130740193/rasomotonibi.pdfIn PDF document text
    • http://files.stlcreativelandscapes.com/uploads/1/3/1/3/131378952/kifuwunumizud-mavedi.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/1/0435/0954/7174/files/werinubib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fuwemosuwizukuxitakalav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9032/2335/files/jipafonuletesolex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8769/7822/files/doxakarozagobufaxubunudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9947/8434/files/jakapadefogugugeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/72387977417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/50095990360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7034/9731/files/telesonoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6835/7796/files/tosedexawejepiliwikalux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/xunoboni.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_off00008668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8668 5408 bytes
SHA-256: 9105e765ee3c0b1d503b62d4eabbba49578ddc006b59ab47bdfc5b96894c87fb
font_01_sfnt_off000098ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98BA 10184 bytes
SHA-256: cbeded2b6ac9494a83dd3a3e9b75bb44ffcdb6aea5deaa48c0b3fe3a89fa45ee

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