Malicious PDF — malware analysis report

Static analysis result for SHA-256 20b22a3cc033533c…

MALICIOUS

PDF

56.9 KB Created: 2020-08-12 00:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8a08aff1742b4cc970d427206f82b7eb SHA-1: 8cee7e63d8e0e738176ee4076d18e7db3d6f7d8c SHA-256: 20b22a3cc033533c68205c74ce82ad5ba1f2c5be3eace092f242e5969c139e7d
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=bach+cello+suites+pdf, which is used to redirect the user to potentially harmful content. The document also exhibits characteristics of a link farm, with numerous links pointing to external PDFs, suggesting an attempt to manipulate search engine results or distribute content from various sources.

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=bach+cello+suites+pdf In PDF document text
    • http://mufoj.ikebanafuzion.com/uploads/1/3/2/8/132815110/5089588.pdfIn PDF document text
    • http://files.aftdoc.com/uploads/1/3/0/7/130739772/xipuxulizap.pdfIn PDF document text
    • http://files.spinetingle.co.uk/uploads/1/3/1/4/131437967/7146643.pdfIn PDF document text
    • http://files.joplatesnweights.com/uploads/1/3/1/8/131856827/seturoz.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/1/0431/0610/7552/files/bifakexomobifovawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7015/9016/files/47398051145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/kazawuwogafalumet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1356/2787/files/32900256241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4178/3959/files/libajite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1461/8277/files/business_partnership_agreement_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/71292981891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7278/1478/files/zoviju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3064/1829/files/77171591642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2717/6344/files/auditoria_interna_unam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3878/4158/files/tepavan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8583/1070/files/kususamarerutu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C70 5196 bytes
SHA-256: 508dda05a8b7cc3804957e3d65aaf23c3744c110c72b3165a5e4bd9da5929f4e
font_01_sfnt_off00009e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E17 10120 bytes
SHA-256: e7b9abde8a4aab8bfec8582b72992d6e8837bf1b0def3632db443e80267e4f23
font_02_sfnt_off0000c0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F9 16120 bytes
SHA-256: 15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208