Malicious PDF — malware analysis report

Static analysis result for SHA-256 55d5a331582590d0…

MALICIOUS

PDF

65.4 KB Created: 2020-09-19 02:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5b14f43652577a3cc80e6f2a670eb9bc SHA-1: bb8f13df407ef92ebbf15c4bfd349f19474c2b0f SHA-256: 55d5a331582590d0807984159a4b58616e233b4379b729e0b9c9b384efd12d43
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a call-to-action phrase and embeds multiple links, including one pointing to a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the redirector. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, likely for SEO manipulation or to obscure the malicious destination. The presence of a download button lure further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/wix?keyword=showbox+apk+update In PDF document text
    • http://senubo.prolyticsconsulting.com/uploads/1/3/1/4/131406710/ee1d2.pdfIn PDF document text
    • http://files.alexandremiller.com/uploads/1/3/2/6/132680974/bidowaxiju-fodumovif.pdfIn PDF document text
    • http://mazupa.thecarbunclemoon.com/uploads/1/3/2/8/132814007/353e05372f988.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/1/0429/7143/1065/files/75059252402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5384/0534/files/shawn_mendes_houston_setlist.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8124/4573/files/gerimojenanimizinit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3412/3160/files/65929388038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5009/9107/files/83913942587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2132/0870/files/ark_survival_evolved_parasaur_taming_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/56501469269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4179/0871/files/98128480922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0897/4235/files/83819178330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4012/0733/files/todefoxizipumumaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6444/2521/files/89923364599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5173/6471/files/senaradazomepavo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1633/1172/files/conjunctions_in_english_grammar_with_examples.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_off0000c21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC21D 5208 bytes
SHA-256: ae6375ce0ec45e1196d3cc90a99d349988ed5ad4e8665f1a6989407c331e7947
font_01_sfnt_off0000d3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E3 10816 bytes
SHA-256: c7bda031c6945bd6ff81a89dbb72d99fd0bd0597914e32a44300846ef0d42ccf