Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dfd4a369d35d9a3…

MALICIOUS

PDF

36.8 KB Created: 2020-08-13 22:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d0e897d259c8210bd1412900c634ce45 SHA-1: 2d85ec13e10816cf43af639c3b114f244fd8be67 SHA-256: 6dfd4a369d35d9a30d63aa47dfdffd54e3172b5ce104eb2346dd3d9484157c1e
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service that is flagged as malicious. The document body and heuristics indicate a lure for downloading software, specifically referencing 'uc browser old version 2016 free'. The presence of many external PDF links suggests a link farm designed to improve SEO for malicious download sites.

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=uc+browser+old+version+2016+free In PDF document text
    • http://ruwurazu.jillhakala.com/uploads/1/3/1/4/131438137/275fdff66b7e.pdfIn PDF document text
    • http://files.key2evolve.com/uploads/1/3/0/8/130874318/zasabuxemer_xawapikiguromik_balasoge.pdfIn PDF document text
    • http://files.easybasicphotography.com/uploads/1/3/1/6/131637114/f2472fefb3c.pdfIn PDF document text
    • http://files.themaverickofficial.com/uploads/1/3/1/6/131606486/7046445.pdfIn PDF document text
    • http://files.russcarlton.com/uploads/1/3/1/4/131453214/c6f6eb4dafc8.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/1/0432/8348/0736/files/85386483536.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9853/0201/files/4600576293.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/samodibubuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/case_study_on_accounts_receivable_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/76300997238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1155/4980/files/pituze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/jelovuradimuritusixete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0581/2629/files/27544603432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0516/5216/files/xekowozibazovav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4588/7905/files/wunetuki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6576/8096/files/24175311822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4135/6950/files/44636009796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1379/9066/files/20800199274.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 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_off00004c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C54 5568 bytes
SHA-256: 8d14a1d94ca93115807b61d62291a766535e12220c9267551dfc3c4c0cfcb23b
font_01_sfnt_off00005f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F70 12368 bytes
SHA-256: fff066331b20c90b43faecdd68bee6d10699d1ec90390c1315f434fe845af308

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