Malicious PDF — malware analysis report

Static analysis result for SHA-256 3953b8fe7c0d372d…

MALICIOUS

PDF

44.0 KB Created: 2020-08-02 16:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a8a92f01f22bb88914ea370500815cba SHA-1: 26af477fa58ba970cf60a889f8e3d2a9a241d317 SHA-256: 3953b8fe7c0d372d7eff954492ae70cdd2409fb1aaa328ea16ff3e60a9116f43
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic search engine results, directing users to a malicious redirector at `ttraff.ru`. The document body, though heavily obfuscated, contains the same URL and references 'Harrisons internal medicine pdf', suggesting a lure to disguise malicious intent. The presence of numerous embedded links and the ML classifier's high confidence score indicate a deliberate attempt to distribute malware or conduct phishing.

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=harrisons+internal+medicine+pdf In PDF document text
    • http://files.caleotravel.com/uploads/1/3/0/7/130740184/baxonebujobigutura.pdfIn PDF document text
    • http://files.leadtxip.org/uploads/1/3/0/7/130740573/kugasatu-xuzafoteja-robawipo-zovevow.pdfIn PDF document text
    • http://files.dallingranch.com/uploads/1/3/2/8/132814048/befilirilebi.pdfIn PDF document text
    • http://files.howtobeastrongwoman.com/uploads/1/3/0/7/130775784/2c95bfd42d897b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4914/8828/files/10316011397.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/25511397528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/rizikizolobizotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2296/7207/files/11481930914.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0096/9896/files/85606546947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3801/4616/files/6782733860.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3141/2379/files/devakilafifelojepaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0498/4483/files/livixilufanugatadupolilew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/zudinemenoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0941/7127/files/xugenapuxixalasemizakozuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2304/6555/files/61863245553.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 5

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6161 5048 bytes
SHA-256: 5c8bb4526622c393911b968649f2a25234b445bbcb71a7b64e6a22eefc6163d1
font_01_sfnt_off00007268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7268 10200 bytes
SHA-256: 9f920a86745712c56d4c87cce80a604e0f135d6b7aab75089d79c46da8ae6685
font_02_sfnt_off00009536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9536 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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