Malicious PDF — malware analysis report

Static analysis result for SHA-256 1253a046efd186f6…

MALICIOUS

PDF

46.3 KB Created: 2020-08-23 21:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ff36b2708bf995011b08b9d930f5dfc7 SHA-1: 908a51f04f9e9ac4a9a4798153f43ab3799779b0 SHA-256: 1253a046efd186f6f9beec91ebf8fe9fd3d99262f920ba8b97e7895b615447bf
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, ttraff.com, which is likely part of a phishing or malware distribution scheme. The document body and heuristics indicate a lure for a 'free font download', which is a common tactic for distributing malware or leading users to phishing sites. The ML classifier strongly indicates maliciousness.

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=f37+bolton+font+free In PDF document text
    • http://pebule.championcleaning.net/uploads/1/3/1/3/131382134/8272b4cb409.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/1/0436/5264/5017/files/baldrige_criteria_for_performance_excellence_healthcare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6213/0848/files/60002036631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4902/5690/files/wepowudefamenadukodem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5669/3397/files/zatodupoxif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9108/3670/files/customer_service_associate_job_description_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3824/5017/files/82590286311.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9839/1196/files/778227247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4636/2533/files/kudekuwovopi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4714/7928/files/sigimuzutulipopos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3735/9271/files/treasures_grammar_practice_book_grade_5_teacher_s_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1478/2119/files/aortic_regurgitation_pathophysiology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/59854739703.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3C 4712 bytes
SHA-256: 463c7c386aa86cdea635edbdd40696c07e2a569187649d0d7347f48317080172
font_01_sfnt_off00006f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6B 11948 bytes
SHA-256: 7ca8e0616efb5522300e912ce550f670ca9ea3d7aba98c9d7568d24dca28178c
font_02_sfnt_off000097a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97A0 16084 bytes
SHA-256: fb27248ec02d804caa0ce6a8dd06a8f0f211157336bc50f6c382585ff5fe3da3

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