Malicious PDF — malware analysis report

Static analysis result for SHA-256 33fee603993f2e30…

MALICIOUS

PDF

35.1 KB Created: 2020-08-20 19:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a1c236e68a1d2d6af6688abfe6410056 SHA-1: 9f358f20f47abd4a2fefddfe20f95eca4daf74b4 SHA-256: 33fee603993f2e30427e85a0278187679e82df070563119ada58dab465723c61
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body text, though heavily obfuscated, contains phrases like 'Australian super account closure form' and a URL that strongly suggests a phishing or scam lure. The ML classifier also flagged this PDF with high confidence.

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=australian+super+account+closure+form In PDF document text
    • http://bizitesa.tiffanyshocklee.com/uploads/1/3/0/7/130776795/a9a5200c.pdfIn PDF document text
    • http://files.mensshedindooroopilly.com/uploads/1/3/1/8/131856827/narawaru_wumir_fonubonuxa.pdfIn PDF document text
    • http://nuvunop.starlightdancecamps.com/uploads/1/3/0/7/130775726/e51ad864303a10c.pdfIn PDF document text
    • http://files.braillenaturetrail.com/uploads/1/3/1/3/131381614/kiliwajumematal.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/1/0440/5261/1222/files/mejedoxalekojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6821/0852/files/79591048120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0688/5027/files/67891625684.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/fable_2_cheats.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/accelerated_learning_techniques_brian_tracy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7062/7735/files/43617200153.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2499/0887/files/31315176151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0508/3811/files/bilyoner_android_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8338/2427/files/bawitubumabazasupadilivel.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 3

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_off00004102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4102 5032 bytes
SHA-256: 5412c24cb74d4797ad77bbc55e95ff0d6308b362cd3b510158968904959aebe4
font_01_sfnt_off000051fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51FD 9244 bytes
SHA-256: cb23c6a90d704e72e89125f4d49b3ecd4e4377516c7eee231fb72a20d76ad9d2
font_02_sfnt_off0000719d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x719D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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