Malicious PDF — malware analysis report

Static analysis result for SHA-256 13553b98a48acfcd…

MALICIOUS

PDF

41.9 KB Created: 2020-08-14 12:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6632c2a8488d09dedc9db99a5ee4b80e SHA-1: d4af22b136bb3b7eb719b7a20aa4110b3f20b67d SHA-256: 13553b98a48acfcd7a1d8734237365d35f07afb62d95f47d43b6f81213551300
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) that is flagged as malicious. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a worksheet, and the heuristics confirm the presence of malicious redirector links and an SEO link farm. The ML classifier strongly indicates maliciousness, suggesting the document is designed to lead users to malicious content.

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.com/wb?keyword=metals%20and%20non%20metals%20class%208%20worksheet In PDF document text
    • http://wakekuj.oldlakewoodshop.com/uploads/1/3/2/8/132814930/5fb76.pdfIn PDF document text
    • http://files.oxfordgardendesign.com/uploads/1/3/1/4/131437683/8624130.pdfIn PDF document text
    • http://files.winsoft.com/uploads/1/3/2/3/132302802/xafegisivopaluran.pdfIn PDF document text
    • http://files.brightsidecbd.com/uploads/1/3/1/3/131382430/wasexe.pdfIn PDF document text
    • http://files.santabarbaraplaces.com/uploads/1/3/1/3/131398440/bitude.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/1/0431/4667/4336/files/alanganallur_jallikattu_video_2012.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6051/7269/files/89957638745.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/cfa_level_2_books_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7122/5502/files/42181481303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9465/4632/files/6914257814.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1894/4665/files/luzepujujanozajagu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0816/3993/files/fupiregipoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75320426607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3459/0888/files/fikevepabokaguba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0471/4404/files/48734538285.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 6

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_off0000646f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x646F 5532 bytes
SHA-256: 7ddd71a7634486675ded0f54fb5dd6c2b28359336d1a8f5b82e68165dea3a514
font_01_sfnt_off00007725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7725 10420 bytes
SHA-256: 8f3b11a83f2ebbd0d9b1b565a9b1ced526ae28ca0bcc3d1a602e977646288cce

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