Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4c08586d1fc7313…

MALICIOUS

PDF

44.0 KB Created: 2020-07-15 10:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 77cd32aa1fa3d40e6fa06edd8702df3e SHA-1: 1382c4e23ca34e692ac1ee6a4619b3a7340b43f2 SHA-256: c4c08586d1fc73130c82341ea629d56a27c09f949186ce58b43d2616f81eed4f
194 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to further malicious content. The document also exhibits characteristics of a link farm, embedding numerous external links, many of which point to WordPress hosted PDFs. The primary lure appears to be educational material for 5th graders, specifically LCM and GCF worksheets, to entice clicks on the malicious links.

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/wb?keyword=lcm%20and%20gcf%20worksheets%205th%20grade In PDF document text
    • http://files.foresthillbaptistchurch.com/uploads/1/3/0/9/130969241/9186873.pdfIn PDF document text
    • http://files.gpuuc.org/uploads/1/3/0/7/130776196/xulexokawo.pdfIn PDF document text
    • http://files.stpaulcaledonia.org/uploads/1/3/1/3/131379410/pumosufebumodika.pdfIn PDF document text
    • http://files.ashleybiscan.com/uploads/1/3/0/7/130776298/wopatapofevogefo.pdfIn PDF document text
    • http://files.asapa.info/uploads/1/3/1/3/131398291/2b1dc5a739cfd25.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://boguxodun.files.wordpress.com/2020/07/wirafotejikokirapalupawi.pdfIn PDF document text
    • https://gofifod.files.wordpress.com/2020/06/nijifojaz.pdfIn PDF document text
    • https://zadoxofa.files.wordpress.com/2020/07/92471533993.pdfIn PDF document text
    • https://wivezojajut.files.wordpress.com/2020/06/luvutibigajavulevixix.pdfIn PDF document text
    • https://budimonisak.files.wordpress.com/2020/07/besalodoxepogozovepe.pdfIn PDF document text
    • https://kuwinekej.files.wordpress.com/2020/07/kelolezufeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/talaximanuzadojomufazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/85069718260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rowogumidakedodovejizana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5453/7624/files/45447487983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/85348703305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6413/9669/files/veteranivilodowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6593/3985/files/82515408469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/26369978761.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F04 5364 bytes
SHA-256: cb78732ae9ee763e3a5d446849e18c2e8b1d49f8f649aa7cf2e5c2584fe31646
font_01_sfnt_off00008126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8126 9856 bytes
SHA-256: ad5776efa687c9a755cfdeee26727469d4e3c0058ffb8a8684b702b43e8c99ba