Malicious PDF — malware analysis report

Static analysis result for SHA-256 436b62769dbd27b4…

MALICIOUS

PDF

43.3 KB Created: 2020-08-13 21:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6b15d3ad578d99f4aeae468bb4c76a2b SHA-1: 3f9ed4139208730524ace202e565194a28b0e45d SHA-256: 436b62769dbd27b4701f82c247299bdbff661e5d59b55d4c00a0a560236788a8
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF files, likely for SEO manipulation or to host further malicious content. The primary malicious URL is a redirector designed to lead users to potentially harmful sites.

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=circular+saw+blades+for+cutting+sheet+metal In PDF document text
    • http://files.maylingkopecky.com/uploads/1/3/1/4/131408086/tasitizoxileruravi.pdfIn PDF document text
    • http://files.jojoamo.com/uploads/1/3/1/0/131069819/dd4e7c4.pdfIn PDF document text
    • http://files.livingwaterscooperative.org/uploads/1/3/1/4/131453698/zutizotoz_tulova.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/1/0433/6759/6184/files/guweralim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/0348/3036/files/45603729337.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1070/9915/files/fekinejomazaduwexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4474/7929/files/sediaan_apusan_darah_tepi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/19004915519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7441/1926/files/72947157269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/zagepemedatapoderotefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/44850711910.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/sequences_of_transformations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3946/4341/files/94217341250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5157/3657/files/ruzuxaxe.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_off00006b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B48 5572 bytes
SHA-256: 2a22d2d1901ed287d68ff91691dd560274cc647827bb7f1869262b90e977a86e
font_01_sfnt_off00007e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0F 10216 bytes
SHA-256: f7889e0bb13893e861d7fdc2a089b634895ab1f479bd4468b60d09b52430f6c9

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