Malicious PDF — malware analysis report

Static analysis result for SHA-256 13c37bbee1488c31…

MALICIOUS

PDF

45.0 KB Created: 2020-08-12 05:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 409fd8d4d3e8854717d831b423a1adec SHA-1: b1884e06b88cf9f8f7398c8efcb5fa014edac641 SHA-256: 13c37bbee1488c31d5476270e37fd165cda2d17c32b4f6b65cfe891573194482
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to SEO-optimized redirectors, with a critical heuristic identifying a link to known malicious infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to lure users to a phishing or malware distribution site. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

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=mariage+d+amour+pdf In PDF document text
    • http://files.redrunebooks.com/uploads/1/3/1/4/131411688/wukuf-kitawawizani.pdfIn PDF document text
    • http://files.elainecairneyhomeopathy.com/uploads/1/3/1/4/131437044/dumutejesok-kumofakex-dukagew-fevumu.pdfIn PDF document text
    • http://fugokujek.sheiladavis.ca/uploads/1/3/1/0/131070420/fonetezosujekow.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/1/0427/9028/9574/files/convertir_de_a_word_online_con_ocr.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9842/1913/files/manga_studio_5_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3849/9235/files/9720454618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3162/5882/files/xotik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0131/4454/files/monitoring_and_evaluation_reports.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/84776822552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/38590402050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0930/9848/files/72591106343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9150/1990/files/53699211171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/zenazuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8071/8238/files/autumn_leaves_trumpet_chet_baker.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D5C 5156 bytes
SHA-256: ecd2a3d40e5a2f3c8d9e572521189f3032b33fc8b27be3ff3b97d65feabd9393
font_01_sfnt_off00005ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECD 3320 bytes
SHA-256: 1f1ca983a0d6ce976ed0d1d93873d250712b60a76ae721accbb10213f9aced0c
font_02_sfnt_off00006c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C90 10848 bytes
SHA-256: bf5ac94d1ef0cd3363a03e85dab47612c1a80351b813a6965ad6146d8bfd1278
font_03_sfnt_off000091e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91E1 16120 bytes
SHA-256: 15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208