Malicious PDF — malware analysis report

Static analysis result for SHA-256 33f4bfa7ff64eb35…

MALICIOUS

PDF

60.8 KB Created: 2020-07-31 14:02:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f7db367256c4c45c4922b9b8d5e251b4 SHA-1: ccfead916a01fb421aa1b0d8af9c8ee9751dc938 SHA-256: 33f4bfa7ff64eb353a6209ebb916507ef0ee1698fb43d92eee8be929b755fb34
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links that redirect to malicious infrastructure, specifically identified as a redirector. The document body, though heavily obfuscated, suggests a lure related to a 'spring boot mvc tutorial pdf'. The presence of numerous external PDF links, many pointing to SEO-optimized URLs, indicates a link farm designed to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=spring+boot+mvc+tutorial+pdf In PDF document text
    • http://files.sccavanners.com/uploads/1/3/1/4/131454352/jakipoji.pdfIn PDF document text
    • http://files.broomandblackberries.com/uploads/1/3/2/6/132682070/tefojonosove_wufiwudusabex_ronufepaves.pdfIn PDF document text
    • http://files.calijyl.com/uploads/1/3/2/7/132710603/6463826.pdfIn PDF document text
    • http://files.beaurobertspianist.com/uploads/1/3/2/6/132682076/fopiz.pdfIn PDF document text
    • http://files.texashollandlops.com/uploads/1/3/1/3/131379371/7953459.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/1/0431/8943/6580/files/gitukedekowaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4550/2626/files/nifiwetuxobaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2605/4306/files/90326117745.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7433/8472/files/78567253040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5108/0090/files/77861958715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4287/3249/files/rataresuwoxiro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20597849085.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/niweforobop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/53463286681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8555/4073/files/jizopatopin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1536/5031/files/pazejeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/jawobi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000984c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x984C 5364 bytes
SHA-256: 40ad2ac2c1b68a618ee908239698b77690c78c326b318762e9dacfff64115f79
font_01_sfnt_off0000aa63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA63 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0000b2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2F1 16300 bytes
SHA-256: a5ec9ea4996b03850e3c291def23928a1463c0886e87abcc7036dfe7579ccb96

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