Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ffb8e9af8687fbe…

MALICIOUS

PDF

36.3 KB Created: 2020-08-22 03:37:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a0391a692d4623a86e9f3223b84ea92e SHA-1: ef27bde6d88170897e912763fb39969576d234b3 SHA-256: 5ffb8e9af8687fbe0652a989c037b039d0462a344205003733c10e5df1a878eb
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a lure for free PDF downloads. The primary malicious URL identified is https://ttraff.com/pify?keyword=kumon+math+workbooks+free++pdf, which is likely used to redirect users to a phishing or malware-hosting site.

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.com/pify?keyword=kumon+math+workbooks+free++pdf In PDF document text
    • http://vinixuj.alswinners.com/uploads/1/3/1/6/131637257/53ad2.pdfIn PDF document text
    • http://nepaxu.yesindustrialsupply.com/uploads/1/3/0/9/130969280/212746d.pdfIn PDF document text
    • http://pazum.trangallan.com/uploads/1/3/1/6/131606339/ffdb97a63608.pdfIn PDF document text
    • http://files.tfamartists.ca/uploads/1/3/1/3/131398250/gigijadugepetob.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/1/0433/8368/5274/files/95866764116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1753/4629/files/24064272183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9776/5528/files/89012742027.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3983/3763/files/necrons_codex_7e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4863/9391/files/rudram_meaning_in_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9417/8982/files/tekixoxanazofesefimez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/bojaninirunozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4132/4184/files/galadixute.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_off00005027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5027 5512 bytes
SHA-256: 32fe4816bdc2a577ea12e5ca2c0be850c537716f64feb428f6d9841d96245659
font_01_sfnt_off000062c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C0 9892 bytes
SHA-256: 67d6d70171147538cb057511021952bbbf71a3fdb4d428438fe3b235b06fe787

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