Malicious PDF — malware analysis report

Static analysis result for SHA-256 39a617d41e788fa8…

MALICIOUS

PDF

46.3 KB Created: 2020-08-24 23:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 66e7cdbc5a5dd593fd0c994b8903d5c4 SHA-1: b8a0183fd0530d85a71910ceabc26b3332ca613f SHA-256: 39a617d41e788fa8110ed27c7ab293945425309672374f77e8c69fd93fdc3831
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO link farms and redirecting users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=number+line+to+1000+year+3+worksheet'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to lure the user to click this link. No scripts were extracted from this sample.

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=number+line+to+1000+year+3+worksheet In PDF document text
    • http://files.malleuspublishing.com/uploads/1/3/1/4/131453799/6582409.pdfIn PDF document text
    • http://bavuliwo.kingstonwestdental.ca/uploads/1/3/2/3/132303338/fdad2331c2d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0004/5469/files/google_takeout_api.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kuvesagapixunijibofalase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3177/9733/files/pibemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8458/2813/files/france_24_reporters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/88406012193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8734/5304/files/any_further_information_to_support_your_application.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8237/5577/files/14785178147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5768/4375/files/2419955753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6901/3158/files/42218645175.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68C8 5532 bytes
SHA-256: 4a83627f0c5536bc3f79f5180e7a4017960c48b814afe1fc65ac13c3a2460050
font_01_sfnt_off00007b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7E 10176 bytes
SHA-256: 6d20a891dd52233d345d0ce284e7e5fed2cce4b0803327e11b9c1fc8f25f9dd3
font_02_sfnt_off00009e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E5F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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