Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e981938c4f7e0b…

MALICIOUS

PDF

44.7 KB Created: 2020-07-31 19:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 417317b9e43fcec5d0d9b6950eaa1839 SHA-1: 2f9b25bf3d1d0f8755a2e966c1d1ce12e905f49f SHA-256: 64e981938c4f7e0b2a06efda67a7408554d5933e7623b631ed74cf6017f38b78
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service that is known to host malicious content. The document body, though obfuscated, includes the same redirector URL and links to various PDF files, suggesting a link farm or phishing lure. The primary goal appears to be directing users to external resources that may host malware or phishing content.

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=avl+tree+java+source+code In PDF document text
    • http://files.gresford.org.uk/uploads/1/3/0/7/130739022/nunivu.pdfIn PDF document text
    • http://files.solarplexusbeauty.com/uploads/1/3/1/4/131437848/186d6839a0e2f3f.pdfIn PDF document text
    • http://files.patriciawilkins-vacca.com/uploads/1/3/2/8/132814624/zojozi.pdfIn PDF document text
    • http://files.tritoncentralbands.com/uploads/1/3/1/4/131407148/6874de6e30f.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/1/0432/4435/5739/files/43779119655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5468/6617/files/54739674717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7201/1932/files/maxusonesunuwifaximaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1447/0302/files/matenowuwowela.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/fakonugupajiwadixulugon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/76331747954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0461/7119/files/52335114385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/gosoduvipagoxizomuvitulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/wavorega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexidemunuviviradepinitim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5649/5783/files/19629167888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4996/8035/files/zelebojabikodexurabuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1301/2630/files/gikipomomomufola.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
🗂 Part of campaign: capripta.com 4 samples

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_off0000636c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636C 5060 bytes
SHA-256: 5be7f5fcb1848b8d8d46e495ce1e0624ee99d8749357d9b95c14ceea6998ecf4
font_01_sfnt_off000074b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74B2 15164 bytes
SHA-256: 2c22d3f2c3f3ba9c62fc3dbb74766248d438b5191c931fed56acb97445aba89e

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