Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7bcbaebff856dc…

MALICIOUS

PDF

42.3 KB Created: 2020-08-26 23:16:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b4468cda2e4a82921794e31864f185d0 SHA-1: ff87788de66ac2bcf188e71b443b74a54e2f3bd2 SHA-256: da7bcbaebff856dc22e755b564ad8b6b8f29afd9960df39089d7c4b64aeddd93
194 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly indicate malicious intent. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure to a phishing or malware distribution site.

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=le+dernier+jour+de+ma+vie+pdf In PDF document text
    • http://files.mknhp.org/uploads/1/3/0/7/130776158/2153881.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/1/0430/2631/7473/files/rijud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4424/9504/files/78294600419.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6954/6396/files/29634887776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/pokemon_sword_and_shield_evolution_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0247/6190/files/wurofaxojobogomibunil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/53244883589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/2777/9999/files/wazaraxelerapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7062/6723/files/92430471993.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0944/0917/files/28155657989.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34993807018.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_off0000635e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635E 5056 bytes
SHA-256: 44f416c9d72916005ffe563cba7d76d6ad000b059210326867ad33ce7ff7e785
font_01_sfnt_off00007485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7485 12040 bytes
SHA-256: 2b65d347357313357132dbc243863f30f122f12f368c475f53acb05695a8caac

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