Malicious PDF — malware analysis report

Static analysis result for SHA-256 827dff518d3870d3…

MALICIOUS

PDF

50.1 KB Created: 2020-08-25 17:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6368879a674b315b7c6da0a9a8d6c78a SHA-1: 1cbdedb587339936fd0cb014858ab9866d8ad800 SHA-256: 827dff518d3870d3a7350d7ec1616262bfbecef33728079fd069a9ec0d2aa252
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, identified as a link farm, that all point to a malicious redirector. The primary purpose appears to be directing users to potentially malicious content through SEO-luring tactics. The ML classifier strongly indicated maliciousness, and the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.com/pify?keyword=abcd+2+chunar+song++mr+jatt In PDF document text
    • http://files.dolphincircle.org/uploads/1/3/1/4/131437530/8260842.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5488/3231/files/81791212788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/13864476636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zenafepejeviwasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/77370732753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1054/6070/files/aplicativo_bradesco_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5897/0280/files/programme_garorock_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4519/9784/files/12787783906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7922/8837/files/zuzidiwami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/79265304831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9147/6133/files/dananifamugesumib.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5254 5656 bytes
SHA-256: 342eeebce88e4a66af4694b4f628df07768d46672ab9897562e9fcc8c067c49d
font_01_sfnt_off00006558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6558 2316 bytes
SHA-256: 5636d8d5fdd5a113ad317891756ad04021119b75fdafbfd8e21eb483790aa3d8
font_02_sfnt_off00006f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F40 6108 bytes
SHA-256: fa3f09f83c1249e69d571fadbc43a01c87b4d258085414d2e53e5a92b4171dec
font_03_sfnt_off00007f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F60 10448 bytes
SHA-256: 7ece07a2d2b2eae1d9bbb500b887cf9bded6a561ae46680b652bdeaec15a17c4
font_04_sfnt_off0000a353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA353 16780 bytes
SHA-256: 107204956a562bfaa87e9c47e357289873638168fa2d60a02f06ace748d3c055

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