Malicious PDF — malware analysis report

Static analysis result for SHA-256 375b0f4ebfe712b8…

MALICIOUS

PDF

40.0 KB Created: 2020-08-12 04:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4836c34e1156edd5669ea32ca36d63d0 SHA-1: 3a9c924a10c395887e3c2bd2019b8d050f559e63 SHA-256: 375b0f4ebfe712b8c3dee4657fc7e9d6568bdb71624830e5355822f3dabe04a7
202 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a helpful guide for merging PDFs. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the link points to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which are likely part of a link farm to improve search engine ranking for malicious content. The document body and embedded URLs reinforce the lure of a PDF-related topic.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=how%20to%20merge%20pdfs%20using%20foxit%20reader In PDF document text
    • http://files.yakimafamilyfarmers.org/uploads/1/3/0/7/130775076/6465017.pdfIn PDF document text
    • http://files.iamdjchizz.com/uploads/1/3/2/6/132681201/7aef2cb0948424.pdfIn PDF document text
    • http://files.atlaslincoln.org/uploads/1/3/0/7/130776001/2385120.pdfIn PDF document text
    • http://files.bethannysbabies.com/uploads/1/3/1/4/131437655/gifizaritugibujur.pdfIn PDF document text
    • http://resuke.marvlindbergmysteries.com/uploads/1/3/0/8/130873851/5711153.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/1/0437/7808/0919/files/vezajakulijazudat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5322/6913/files/61806308648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/68679532415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3926/8769/files/94856315597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0688/5020/files/73268748609.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0491/8941/files/tedulajubimujotalixesope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4190/5045/files/rodomimuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5625/0525/files/34370441576.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5032/6426/files/24771238055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9516/9951/files/tujedorafetu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3903/8359/files/ruxaxebazojutewavemogoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11783771814.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 6

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_off00005c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C81 5452 bytes
SHA-256: a842b438fe1317375361ba396cbca012fc60dc6025594afb5dd2ec60ce04934b
font_01_sfnt_off00006f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F13 10520 bytes
SHA-256: add161d8b1f3bc1c2ace2e4ecccf5dd0c2c2ded637b6b896c8386dbf8f462830

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