Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c1a54921975d822…

MALICIOUS

PDF

35.0 KB Created: 2020-08-13 18:50:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2304f149e1247ce5eff94b67d1150137 SHA-1: e5394386b13d3c58576161c321d9611f88b04c58 SHA-256: 9c1a54921975d822e4fe053ae13c45f557f6b240cd2a57ce8d6809efd00408d7
194 Risk Score

Malware Insights

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

The PDF document was flagged by a critical heuristic for containing malicious redirector links, specifically pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of an SEO link farm, embedding numerous external links, many of which point to Shopify domains hosting PDF files. The ML classifier strongly supports the malicious verdict. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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=asdf+lkjh+pdf In PDF document text
    • http://dutoseke.bearforanangel.com/uploads/1/3/1/4/131437949/kasuziz-gibovujin-xekefosu.pdfIn PDF document text
    • http://bivexeg.fertic.net/uploads/1/3/0/7/130776818/xoweviloz.pdfIn PDF document text
    • http://files.fitzgeraldbenhillcountylibrary.org/uploads/1/3/1/6/131606046/2341609.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/1/0428/1974/8006/files/merriam_webster_s_advanced_learner_s_english_dictionary_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5107/2153/files/common_core_math_5th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bagubiginapir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5753/7439/files/libro_dibujo_tecnico_arquitectura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0236/3045/files/15487124047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2742/9533/files/watch_breaking_dawn_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7785/1550/files/betapifitoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0024/8995/files/fedizofuwobelalirumizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2118/8763/files/causative_exercises_4_eso.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 1

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_off00004936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4936 4952 bytes
SHA-256: 9cada690692cac9e3264b53720eda64a766aeffefae922d82c225768f7eed664
font_01_sfnt_off00005a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A15 11208 bytes
SHA-256: 63ac5aca3f83460b28d08934fd0ea0dde2c0a5b204954429b1b9876bcd1c05f4

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