Malicious PDF — malware analysis report

Static analysis result for SHA-256 a400f8fc37ccc7bc…

MALICIOUS

PDF

35.1 KB Created: 2020-09-14 19:02:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8ce4437c1253ddb69d77f078aa01be1e SHA-1: 15cbdf0e29df258ed9131211d4b73781d48316c0 SHA-256: a400f8fc37ccc7bc6443814256ea07d68b685e3bf012d501c01c5cea273df001
194 Risk Score

Malware Insights

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

The PDF file was flagged for containing a malicious redirector link and a large number of embedded links, indicating a link farm strategy. The primary malicious URL identified is 'https://ttraff.link/pify?keyword=ap+physics+1+simple+harmonic+motion+multiple+choice'. The document body contains garbled text and embedded URLs, further supporting the malicious intent of redirecting users to potentially harmful 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.link/pify?keyword=ap+physics+1+simple+harmonic+motion+multiple+choice In PDF document text
    • http://files.marriedmarks.com/uploads/1/3/2/8/132816158/wawezanuz-titun-resuta-ponupax.pdfIn PDF document text
    • http://files.rusticbilliards.com/uploads/1/3/1/4/131453784/7311987.pdfIn PDF document text
    • http://files.ubcaai.org/uploads/1/3/1/4/131407227/vuzekego.pdfIn PDF document text
    • http://files.hlaa-or.com/uploads/1/3/1/3/131380894/5906340.pdfIn PDF document text
    • http://dabefud.rickbermanceramics.com/uploads/1/3/1/8/131856158/nipetunetan.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/1/0430/3778/6266/files/zozufopifogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6693/1862/files/atlas_de_microbiologia_medica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4959/9651/files/4055387403.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5557/0341/files/bexagebenaxajuxasobodowur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4326/6458/files/75242982211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/5050/0002/files/gite_les_sapins_araches.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5504/6037/files/52097763524.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_off00004c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C4C 5316 bytes
SHA-256: 7f96232cfb432b13aa697752aa06a9a984f63a858085feb1db4b67b09a929146
font_01_sfnt_off00005e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E45 9744 bytes
SHA-256: aa676c600532cfcc375aa879f330d9059c4ac594948bc71a7a2751bbd2e3ac1b

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