Malicious PDF — malware analysis report

Static analysis result for SHA-256 23acbb179ef48815…

MALICIOUS

PDF

37.9 KB Created: 2020-08-21 08:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3ff55b1569a2bdf15cef7ce0e54f159e SHA-1: 2aeadef7bad7d2e520631f870ece0e1afbaf3205 SHA-256: 23acbb179ef48815b39b408bc1f519f8b50662566a8a0663c9e883b037e72953
202 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a guide, combined with a call-to-action phrase. This suggests the primary goal is to trick the user into clicking the malicious link, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=adobe+illustrator+beginners+guide+pdf In PDF document text
    • http://files.shoptexashospitality.com/uploads/1/3/0/7/130740367/ae443e.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/1/0432/3206/7748/files/13968231262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tobilefoseparavako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9872/5793/files/73902466894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/2258591012.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4764/8406/files/can_u_cross_platform_on_brawlhalla.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/68114577438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9898/8954/files/17726570335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/85431839119.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5349/8019/files/favuvux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2225/3208/files/aorta_abdominal_ramas.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_off0000566a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x566A 5336 bytes
SHA-256: a49577ed1d82b2444e9247df612be4afad0b8758118a5a8c203498822865c305
font_01_sfnt_off00006898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6898 10128 bytes
SHA-256: 1a729edffc97216a4d27e2550c153ed87d3d4be05130d690b6a193366eb672b1

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