Malicious PDF — malware analysis report

Static analysis result for SHA-256 f55a41e465fc114d…

MALICIOUS

PDF

43.9 KB Created: 2020-08-17 10:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6ee72712d869efdd9c4c9ef0a50dd5ab SHA-1: cc323e8c2b53592f8956cebbfb25f8a540ece790 SHA-256: f55a41e465fc114d7679e49a150f083b6f96c79c28edefec44aa5a30b41b22a8
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, many of which point to what appears to be a link farm designed for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which likely serves as a gateway to further malicious content. The document body itself is heavily obfuscated and contains the same URLs, reinforcing the idea that the primary function is to distribute these 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.ru/pify?keyword=balanced+diet+information+ks2 In PDF document text
    • http://najepak.cainedelup.com/uploads/1/3/1/3/131380213/5a5bca.pdfIn PDF document text
    • http://jimefoxip.stringtheorytennis.org/uploads/1/3/1/1/131163599/2415800.pdfIn PDF document text
    • http://tiseti.greenrivermwc.com/uploads/1/3/0/8/130874359/2668375.pdfIn PDF document text
    • http://files.andrealapinski.com/uploads/1/3/0/9/130969448/c06efc4605fa.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/1/0429/8797/8913/files/totinajimudipedivetukim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7208/6435/files/pufomomisemuwatikodiruwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4237/1741/files/diritasapotinijiviwixope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11085861466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8353/9366/files/60370396802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/75708539825.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/78656799620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0994/9348/files/bhatti_vikramarka_kathalu_in_telugu_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3319/6706/files/lewoparaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/8029323080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6993/9612/files/vorozikowibubojukutomuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2724/1887/files/90045552011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/29755983100.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 2

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_off00006e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E57 5412 bytes
SHA-256: 81d8971468f2ddc80d6cc2f2262364b304da8626698d9a78d8729c4445bf48e7
font_01_sfnt_off000080a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A7 10004 bytes
SHA-256: a673f9081daef4c8bc41fb034e4cd7799532fb3feeacf3d9fe832d1b3d934d3a

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