Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d37525161f32fe1…

MALICIOUS

PDF

46.8 KB Created: 2020-08-20 07:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 06367776801f9cf29e71e060bd136bb6 SHA-1: be6eb259a28ec1597c90b38a553d40356a77e637 SHA-256: 5d37525161f32fe11a627511df10cc2d67173c02cc7afc3ca6f260e143f955de
194 Risk Score

Malware Insights

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

The PDF contains a link disguised as a free apartment lease form, which redirects to a known malicious URL. This indicates a phishing or scam attempt designed to trick users into visiting malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=free+illinois+apartment+lease+form In PDF document text
    • http://pajener.thaischool.org/uploads/1/3/1/6/131636825/163995.pdfIn PDF document text
    • http://files.rocktopiaacres.com/uploads/1/3/1/6/131606046/2722953.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1390/6333/files/aboutface_mystery_shopper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0388/5206/files/keppel_land_limited_annual_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6767/0689/files/83420545476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2363/8426/files/pejajubaziv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2567/7992/files/buvatin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9908973296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6142/5814/files/sparknotes_the_red_badge_of_courage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/22650439267.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/30100856188.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 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D04 4788 bytes
SHA-256: 16a8fd9d8302f1c630b058bc8fef4061069b21ffe843182fdea647f07b008e36
font_01_sfnt_off00007d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D25 10228 bytes
SHA-256: d337d06dc3a0b10c5b1d42e9da40707e880d7520b84651f1c1242cf83bd57974
font_02_sfnt_off0000a005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA005 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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