Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9634b71dc0ce38b…

MALICIOUS

PDF

44.1 KB Created: 2020-07-31 01:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4a0925d3e3e788420d97ab75a86cf23d SHA-1: 888746ae91cd0c9ccfb708917195b8ec6103efeb SHA-256: d9634b71dc0ce38b4095149e00c1e1bd013e62f08532b6d751034c518d4f07d3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates the document is part of a link farm designed to distribute content, with 17 external PDF links found. The primary malicious URL identified is https://ttraff.cc/pify?keyword=8th+grade+math+worksheet+pdf, which is likely used to redirect users to a malicious payload. The document body, though heavily obfuscated, contains text related to '8th grade math worksheet pdf', suggesting a lure to trick users into clicking the malicious link.

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=8th+grade+math+worksheet+pdf In PDF document text
    • http://files.bowerclocks.com/uploads/1/3/1/3/131382470/7872903.pdfIn PDF document text
    • http://files.littleheathensranch.com/uploads/1/3/1/4/131407284/3074275.pdfIn PDF document text
    • http://files.noahdeist.com/uploads/1/3/2/6/132695329/zomeloge_wiwegino_welumitogitufu_mixekonegibe.pdfIn PDF document text
    • http://files.ahbas.org/uploads/1/3/0/8/130814874/21eeee386af5b.pdfIn PDF document text
    • http://files.safecitysecurity.com/uploads/1/3/0/7/130740127/e88b2.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/1/0429/9912/0033/files/33509184188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1510/9799/files/14841585588.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/tesoxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78476378890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/siduda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1433/2309/files/38979441032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8602/0775/files/45056455068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6020/8540/files/50085090369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3621/1357/files/42277199139.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1649/3976/files/lanupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0670/5312/files/zafajanoniserebojar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2960/files/zawemin.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 4

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_off00006d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D87 5312 bytes
SHA-256: 5e9e86f6cba9c8903d6230cd84944daef5590087a61f12cc25d6f2fcb5a92f63
font_01_sfnt_off00007fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA2 10452 bytes
SHA-256: 23922e7d37c90b748810d87134f37f4901ba68de6bfa326cf56bbb43cc049b29

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