Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca80d1fa7391a46d…

MALICIOUS

PDF

40.4 KB Created: 2020-08-17 02:06:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1e42fd4653c899b826a4b3c8dbf5187a SHA-1: 835ae46c346ff15d13a4b32fbd078619cf21f1b8 SHA-256: ca80d1fa7391a46de975c4317c2afaa939c6eeed8776b4a0a95a731ecd750a2f
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.ru/pify?keyword=base+sequence+of+template+strand, which is likely used to direct users to further malicious content. The document body itself is heavily obfuscated, but the presence of numerous links and the ML classifier output strongly indicate a malicious intent to lure users to harmful sites.

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=base+sequence+of+template+strand In PDF document text
    • http://reweb.feastofstbrides.com/uploads/1/3/0/7/130775537/pisaxoz.pdfIn PDF document text
    • http://sawuka.paintedplanet.net/uploads/1/3/1/4/131454106/d3e39101959f4c9.pdfIn PDF document text
    • http://files.seanysshop.com/uploads/1/3/0/9/130969680/9276472.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/1/0436/5923/1385/files/interpretacion_de_una_biometria_hematica_completa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7364/2389/files/pemog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/7898/6402/files/describing_things_vocabulary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4093/0983/files/31538681654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9088/6312/files/bavusotelenuxiwuraveli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/61367250327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4764/1510/files/kebesemajukozowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doxufuvezemog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/73038932916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/fomixetiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0083/9841/files/16211156039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4343/0305/files/betakebakedaduv.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_off00005f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5B 5476 bytes
SHA-256: 86f45db22820fa2fc848745353635711fb6afd9d188928dd61350e46311f6d87
font_01_sfnt_off000071dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71DD 10300 bytes
SHA-256: 94691e948b148bbdbaee50a1d965da866637815f7f1c18cc81ee51e9944d0ee6

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