Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd63971ea1720689…

MALICIOUS

PDF

45.4 KB Created: 2020-08-04 00:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f09ffdeb18968a3a56f7db9061b6eb9e SHA-1: e837530da336fb3d15a74dd7893d7cc23f731efb SHA-256: dd63971ea1720689199b300559cce3720da88fe5a88cbbc80b0f3e351a6696cd
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL is https://ttraff.ru/pify?keyword=critical+thinking+activities+for+higher+education+pdf. The document body, though heavily obfuscated, contains this URL and numerous other links hosted on cdn.shopify.com, suggesting a lure to disguise the malicious redirector. The ML classifier also strongly indicated maliciousness.

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=critical+thinking+activities+for+higher+education+pdf In PDF document text
    • http://files.tacmit.com/uploads/1/3/1/4/131407138/e2ff4e8c362.pdfIn PDF document text
    • http://files.erinmakesstuff.com/uploads/1/3/1/4/131453106/jemagulo.pdfIn PDF document text
    • http://files.eileefahnestock.com/uploads/1/3/1/3/131384559/90becb.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/1/0429/9338/5633/files/98755395536.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2587/4600/files/50838746081.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5744/5029/files/novipul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9795/6256/files/jizapavijofuvafutemiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9360/6048/files/origen_del_idioma_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1249/7305/files/lisbon_subway_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/kavobedo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/6222567093.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4141/5580/files/51429288947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5927/2090/files/39772404374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2299/2028/files/mugatovosiruniruzizosof.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64AA 5444 bytes
SHA-256: 4a38905df0edc63b154dd3d6f1421004f2f2f753f601d7feb6dd8f67f0387a5a
font_01_sfnt_off00007728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7728 10300 bytes
SHA-256: 657ff612aeeeca3f11dc3e710c236063bc0d01ee0fc1008d880a68e567e98abd
font_02_sfnt_off00009a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A0D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.