Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcf73d2e92bd0ac6…

MALICIOUS

PDF

35.9 KB Created: 2020-08-26 11:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fee27e5f0d727e7fe32b3c949b1ee75d SHA-1: 8583f78739fe65c0d0e69ac0988731682eb2e675 SHA-256: dcf73d2e92bd0ac69a7a7a93744edcebb266956eda77ce54f8f5530e747c40e4
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a redirector to a URL associated with malicious activity, specifically a 'yt video downloader' lure. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF files hosted on benign-looking domains, suggesting a coordinated effort to distribute malware. The primary malicious URL is https://ttraff.com/pify?keyword=yt+video+downloader, which is likely used to redirect users to a final malicious payload.

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/pify?keyword=yt+video+downloader In PDF document text
    • http://files.face2facewithhorses.com/uploads/1/3/1/1/131164460/b4b5c0cace6.pdfIn PDF document text
    • http://files.wstprop.com/uploads/1/3/1/8/131856158/675f98b95.pdfIn PDF document text
    • http://fazovap.ktgphd.com/uploads/1/3/1/6/131636948/gupex-zikilot.pdfIn PDF document text
    • http://metigikiw.adventuresatyourdoorstep.com/uploads/1/3/0/7/130740572/9585232.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/1/0428/7853/3788/files/kebuwiveriripedumilon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19836568605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2007/4663/files/69875672986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/los_factores_bioticos_y_abioticos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/sims_3_horses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0981/0343/files/lutes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9506/4733/files/94691103588.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6899/7283/files/5695778095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5727/4261/files/90674561414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0572/8152/files/restaurant_success_by_the_numbers_pd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9524/4441/files/attrition_mill_working_principle.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_off00004f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F5F 4756 bytes
SHA-256: 58eb71a6765cc2007887ff2d44c6794b13512e8376c15b9273d890d7e078e5f9
font_01_sfnt_off00005fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA6 10288 bytes
SHA-256: 64e62041570c487c197059bd8e09eb2f311db5a94fa20e78650a3dcbe4b2f47d

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