Malicious PDF — malware analysis report

Static analysis result for SHA-256 443c0d61530dadc7…

MALICIOUS

PDF

44.3 KB Created: 2020-08-20 19:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a443d02280f267b05db3fe7a5d0da719 SHA-1: 1a726c6399b3bcc97bec559a5e481dd8a527fa44 SHA-256: 443c0d61530dadc7b42b74265edc276a18fdb83fb2823aee2e446a823e04185b
202 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is the primary attack vector. It also contains a PDF link farm heuristic, indicating mass distribution of links. The document body, though heavily obfuscated, contains the malicious URL and several benign Shopify URLs, suggesting a lure to a malicious site. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=business+card+size+photoshop In PDF document text
    • http://nutur.thecornerstohr.com/uploads/1/3/1/4/131409546/6433884.pdfIn PDF document text
    • http://files.chushinaikikai.com/uploads/1/3/2/3/132303286/kosovidisubunuse.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/1/0432/3049/4878/files/28172600868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4921/2309/files/grandstream_ucm_6204_datasheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/masijajewipudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6594/7798/files/chagas_diagnostico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/90687696164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/free_online_photo_collage_maker_no.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0013/3793/files/nist_800_82.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/8885/8536/files/avd_manager_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/brevi_racconti_in_inglese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1330/6530/files/81758369891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9067/3813/files/9486783661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0657/4238/files/11842539734.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_off00006e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E02 5228 bytes
SHA-256: eb6830eb20a190190ce7c8ed7e81c363ba678c1f22d2ccbf7ef87b75f6554822
font_01_sfnt_off00007fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC2 10764 bytes
SHA-256: d1d335121b652e233b65e9c5327c98431be25da664993b713fcbfa6fc3c998bd

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