Malicious PDF — malware analysis report

Static analysis result for SHA-256 f39cc45760a4b303…

MALICIOUS

PDF

42.1 KB Created: 2020-08-18 19:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 051a8bd2d70cff650c466be1b450d05c SHA-1: 75316e99e49766286fb99b3af582bc09d01a3091 SHA-256: f39cc45760a4b30331c045ca3ac320c48e182bf749fd94f6bad6df430e7a58ae
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a large number of external links, a common tactic for SEO poisoning or distributing malicious content. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=notes+function+notation+answers', is identified as a known malicious redirector. The document body, though heavily obfuscated, contains references to the redirector URL, suggesting it is the primary malicious component.

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.cc/pify?keyword=notes+function+notation+answers In PDF document text
    • http://xurobe.leapaheadcenter.com/uploads/1/3/0/7/130775606/nukiriwili.pdfIn PDF document text
    • http://nunovijat.gaetaboys.com/uploads/1/3/1/4/131454165/tibifogenigulor.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/1/0431/4886/9786/files/xidikokunukimokes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3796/4960/files/86000712942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/ruluvebodixunuso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/40752546921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2585/6672/files/lufavobuvega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/south_africa_political_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/68756152358.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3903/8360/files/42809190915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9284441163.pdf?v=1594212706In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/mulafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/39403100678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8444/5864/files/43905201106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8999/2605/files/17493137263.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 1

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_off000067e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E6 4904 bytes
SHA-256: 28e222e8a9ad1dc3418d0651bf5241575dafcecd02b065964ce8760993676346
font_01_sfnt_off000078bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78BF 10100 bytes
SHA-256: b1d1d8fb95355517d0105a6f0c04eb47925bcb789bd98fff50316c24bcd7fa52

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