Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c1e463b4173a655…

MALICIOUS

PDF

40.0 KB Created: 2020-08-11 14:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 271d02f34e95750bf27fe6c5c903142d SHA-1: 5839f56761c5246f92fa129a1de2cae3d9f1f1f6 SHA-256: 8c1e463b4173a65582c39bccd511b6fae0d7289a463b292b217185f3c3f8eee3
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=beside+vs+besides+exercises+pdf', which is also flagged as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious sites by disguising them as exercise PDFs.

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.ru/pify?keyword=beside+vs+besides+exercises+pdf In PDF document text
    • http://files.stocktontrapandskeet.com/uploads/1/3/0/7/130776680/suzokabizatirawa.pdfIn PDF document text
    • http://files.popacake.com/uploads/1/3/0/7/130739353/34e50a.pdfIn PDF document text
    • http://nunopex.traversebaygroup.com/uploads/1/3/2/6/132696398/c3dff838ce53.pdfIn PDF document text
    • http://gipukuw.irishshepherdshuts.com/uploads/1/3/2/7/132712207/vurokojoxojopuj_gusig_ponipewe_pekas.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/1/0428/5782/4419/files/foluwezow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3468/1250/files/24545525051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3427/9062/files/52537514502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0267/4845/files/mekege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/wutuvajozitamumuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/82887243322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/xutiwogenisajekotufevotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9190/9025/files/code_complete_steve_mcconnell.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/fuwelolorogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0236/3045/files/93999472920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/53969379048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5391/6053/files/22709780608.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9241/8468/files/luwef.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_off00005e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E69 5224 bytes
SHA-256: 138bddb7e3fdac8f27a4b6b21a055020523049e9343d6a1693d39c533ea43c05
font_01_sfnt_off00007043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7043 10304 bytes
SHA-256: c0752071fd8c6ad72ce4650d21adeaecb62b317814a5e008dda805f85e779709

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