Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3427242116dfc16…

MALICIOUS

PDF

48.8 KB Created: 2020-07-29 13:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cad91c3e388929ea89b43511b3376cd5 SHA-1: 5cb967fdbebaca5c1e2b019eac0c7f05c9738da8 SHA-256: f3427242116dfc16cfcaf312d829a88fc9fe26d7932983bf7daff63146fa2c2f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with at least one pointing to a known malicious redirector (ttraff.cc). The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The primary attack pattern appears to be a link farm designed to lure users to malicious sites.

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.cc/pify?keyword=bandura+observational+learning+pdf In PDF document text
    • http://files.mollyshappytrail.com/uploads/1/3/1/3/131381722/f380d17dba2a231.pdfIn PDF document text
    • http://files.unitedmediasolutions.info/uploads/1/3/2/7/132710791/nuganikowavo.pdfIn PDF document text
    • http://files.monarchaccountinggroup.com/uploads/1/3/1/6/131636825/2906a68865.pdfIn PDF document text
    • http://files.dawnasdesignthreads.com/uploads/1/3/1/6/131606411/fc411e9e90.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/1/0435/2140/9184/files/78802190032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5197/3794/files/15208616641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1530/6405/files/34094231262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6067/4198/files/9328465983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6379/5094/files/155864449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9307/2808/files/95597084781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8669/0969/files/35864430385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1243/7662/files/90605908948.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/68752712081.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2299/1007/files/dipokid.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 8

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_off000080b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80B7 5340 bytes
SHA-256: 39921c6dab2f231f81b119305a18170cf7b7d83ca48dee70361727e8c6fd0d8b
font_01_sfnt_off000092f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92F1 10436 bytes
SHA-256: cd10b35035e8c3b64f8ad058f6fe5e6f0038d7c14912e833ba48116c8ca82b74

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