Malicious PDF — malware analysis report

Static analysis result for SHA-256 e18827705c1b5a9b…

MALICIOUS

PDF

39.8 KB Created: 2020-08-16 13:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1f188d9045fd594f07cb1e7f1ea6c1bb SHA-1: d5247d8e0036da29bcda2cd7de71b377919c7b0b SHA-256: e18827705c1b5a9bf08062d5d5cd0d6ec52039b37b60e2e30b607e6229207447
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a link farm, and the ML classifier strongly suggests maliciousness. The primary malicious IOC is the redirector URL, which likely serves as a gateway to further malicious content or phishing pages.

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=my+weather+app In PDF document text
    • http://files.andrephotography.net/uploads/1/3/1/3/131384301/jisenema.pdfIn PDF document text
    • http://files.justintylerowens.com/uploads/1/3/0/7/130738870/zasin.pdfIn PDF document text
    • http://files.bearsmediacenter.com/uploads/1/3/0/9/130969075/sekuligazigowu_takomotebijuwe.pdfIn PDF document text
    • http://files.scienceofspace.com/uploads/1/3/0/9/130969305/sifujunagibiw.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/1/0432/2210/6271/files/vavizudizezosuxuxefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7301/0850/files/12013067131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/kips_9th_class_chemistry_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/zuxabegitigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3569/7063/files/dagarunabinewinurix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7529/7689/files/robotics_engineering_books_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0118/3397/files/pikemujap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6227/8809/files/bamboo_plantation_project.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/pelowixag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5060/5461/files/alphabet_and_sounds.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 8

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_off00005fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCD 4896 bytes
SHA-256: 00885935fdf47c5fa5fd9f2283f70b34a09e1798586a32b2d9ee0984b305325e
font_01_sfnt_off0000708d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x708D 10048 bytes
SHA-256: 331c0c35bce0df4ecbe1dcae8505ada63e5fec532b5d6325386bbee4c91e7865

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