Malicious PDF — malware analysis report

Static analysis result for SHA-256 b767807ff5679fa8…

MALICIOUS

PDF

52.8 KB Created: 2020-08-23 15:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2998c61a0a4894540c9ab973b6bd0bd3 SHA-1: 6669c2c8801b2cefc127ab2f4351fb8e38cc925f SHA-256: b767807ff5679fa8e0bbea23bf7cca6f41aa113fc9f83bb7db0e8687c98b883a
234 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link. The document body, though partially garbled, contains text suggesting a lure for free software ('Autodesk maya 2013 free'). The presence of a password-protected archive lure heuristic indicates a common technique to bypass gateway scanning. The ML classifier also strongly flagged this PDF as malicious.

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.
  • 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
  • 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/pify?keyword=autodesk+maya+2013+free In PDF document text
    • http://files.conradstroebel.com/uploads/1/3/1/1/131163872/324031.pdfIn PDF document text
    • http://files.crochetmilie.com/uploads/1/3/0/9/130969926/c48e85.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/1/0427/6345/2583/files/glasses_png_hd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5590/6973/files/wotetolajesamodakuxopun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6944/8097/files/6680074062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5560/4121/files/pdf_split_and_merge_download_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6634/3072/files/chemistry_a_molecular_approach_1st_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9583/4280/files/babulal_calendar_2019_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/one_piece_free_1080p.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/60968929978.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3013/3406/files/zikokovavavifowusu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5235/1144/files/kupovikabivajezimopidugi.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_off00008f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F00 5668 bytes
SHA-256: ab6f8415ca6e2312ca4aaa6c600fc486ff40036d8b6f1e7e9580cb6a0f525d38
font_01_sfnt_off0000a23d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA23D 10792 bytes
SHA-256: 0c2bb8fee4cb08d633870fc158bdfd7eb0d3d32c4191ebc6a75b4a3664151790

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