Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8c3558e062fd3cd…

MALICIOUS

PDF

36.7 KB Created: 2020-08-23 14:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a844ed8af8817e9a17b6a05a71f1aff9 SHA-1: 73aaaff540c2242ffb325774372a05cd44d6ba8f SHA-256: b8c3558e062fd3cdf6d80a837eb9188c6ecb853a2dc73aa39fb78e4e885d3b3c
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external links, characteristic of an SEO link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=uniforme+instituto+chipre+manizales. While no scripts were extracted, the sheer volume of links suggests a delivery mechanism for further malicious content or traffic manipulation.

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=uniforme+instituto+chipre+manizales In PDF document text
    • http://files.peachandpippin.com/uploads/1/3/1/8/131856270/ad448452920a172.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/1/0433/3089/6026/files/pesuzedotorotipokugaxazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0751/6565/files/schulferien_baden_wrttemberg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/2033/2705/files/interview_skills_ppt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/25337320158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5086/8646/files/gamox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5782/4419/files/zodofewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7754/9728/files/7140229726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7980/2782/files/zezulubewafozito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1264/3227/files/91093821760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6447/5304/files/club_car_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7857/2450/files/auxiliary_verbs_and_modals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/sejorudekomufusifiwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/englewood_beach_weather_report.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 2

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_off00005317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5317 5296 bytes
SHA-256: 918d98b51a572b6324b5c76389d5185651e724a73cfad56440930b67c289997d
font_01_sfnt_off000064f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F9 9688 bytes
SHA-256: cd0e8d26ddb6939e5799a70aed710d02e504da4aa8e073570b7e82e6981aa354

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