Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd86db6a42aa0733…

MALICIOUS

PDF

63.4 KB Created: 2020-08-24 15:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d982938f5a4d7ca435ae2a167e43e5a1 SHA-1: 1bd3bf4b38a7321b975f206d811836d5e92ad88c SHA-256: cd86db6a42aa07334810b76cde4c0bc328731a469cf370317952c5462e397e1b
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to redirector infrastructure like 'ttraff.com'. The presence of a 'download button' lure and the 'password-protected archive' heuristic suggest the document is designed to trick users into downloading malicious content or visiting phishing sites. The ML classifier strongly indicated maliciousness, and the embedded links are indicative of a link farm or SEO poisoning tactic to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.com/pify?keyword=macbook+android+studio+adb In PDF document text
    • http://files.dynamicactor.com/uploads/1/3/2/8/132814241/nupujiditixupo.pdfIn PDF document text
    • http://files.tacticaltorture.com/uploads/1/3/0/7/130738821/035a8d8ac.pdfIn PDF document text
    • http://files.julielangegroth.com/uploads/1/3/1/6/131606537/tijudo.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/1/0435/2360/4631/files/ruwijoziwizawop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6594/0904/files/vupusekelozowavowoguxuson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7503/5541/files/accidents_reported_today_colorado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2289/8584/files/sims_4_mac_torrent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0144/6551/files/campbells_biology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9308/2783/files/psychological_suspense_thriller_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8568/5153/files/93765779353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3967/6821/files/el_capitalismo_salvaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1123/4197/files/madigagizanudejomibam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6056/0021/files/2124321592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0287/9387/files/gexopuvugefonusamukijola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3590/2631/files/pressure_ulcer_stages.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0950/6471/files/23021796374.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_off0000ba2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA2D 5108 bytes
SHA-256: 677c3910cb939ba4bb28515f47c34bf606d75c530c502a6518eabdc6458b0d39
font_01_sfnt_off0000cb98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB98 10912 bytes
SHA-256: aa99bc954637dc5e45433888aff3f42b00503be643a02a7154af86013700efd0