Malicious PDF — malware analysis report

Static analysis result for SHA-256 1834a5d40c8d5032…

MALICIOUS

PDF

36.5 KB Created: 2020-08-15 15:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3d53590bdd268b41774d19ea1dd34547 SHA-1: 89e7dd4f53b394430aa27c82ec78954a3185701d SHA-256: 1834a5d40c8d5032e28f7b99527d581969c8d009f47ebe3b252eaebe9c137e04
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a mass of external links, many pointing to Shopify-hosted PDFs, designed to appear as a link farm for SEO purposes. One prominent link, disguised as a hardware manual, leads to a known malicious redirector. This indicates a likely phishing or malware distribution attempt, leveraging a common lure to entice clicks.

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/wb?keyword=asus%20sabertooth%20z87%20manual%20pdf In PDF document text
    • http://vinutirug.leolinbowen.com/uploads/1/3/0/7/130775126/sukotarixu.pdfIn PDF document text
    • http://files.jcswainenterprise.com/uploads/1/3/2/6/132683463/5302518.pdfIn PDF document text
    • http://files.makersguildinwales.org.uk/uploads/1/3/0/8/130874400/famit.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/1/0433/5039/2984/files/gufarikojaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5650/3707/files/biochemistry_basics_pogil_extension_questions_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/43983836094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6366/5055/files/zelorinasedinetejojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4816/3733/files/jizibevuwejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/tegesogamarepawav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/69307092003.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/4537/6420/files/allied_barton_security_employee_handbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9673/4880/files/nigalawubiwupifaxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9163/9974/files/cumulative_sum_control_chart.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 5

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_off00004ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EA2 5732 bytes
SHA-256: 6c9234fee60c40c5731ceceb73e5b1b67f4964deb44b47bdf5ac2dac11eaae4a
font_01_sfnt_off00006204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6204 10424 bytes
SHA-256: d11a8e9ec7c7ffd81264e8af1c85ffa412b3186feff1d79ec6706a4b6f448f80

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