Malicious PDF — malware analysis report

Static analysis result for SHA-256 13f7fb26edc6cb7a…

MALICIOUS

PDF

34.5 KB Created: 2020-08-19 09:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 52b2fb8b298374c7fec35ad7b9745f0a SHA-1: 01c54e68a8403f81cc8e575231e0defaa4f8ad59 SHA-256: 13f7fb26edc6cb7a135656a24153890db11f1ffd64ac50c0ee65c57513776bd9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics, indicating a likely phishing or scam attempt. The ML classifier strongly suggests maliciousness, and the presence of a redirector points to a downloader or phishing lure.

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=banyuls+sur+mer+tourist+information In PDF document text
    • http://files.nodaysoffalthletics.com/uploads/1/3/0/9/130969158/vazujalu.pdfIn PDF document text
    • http://files.monicaleekennedy.com/uploads/1/3/2/8/132815054/672857d1.pdfIn PDF document text
    • http://files.raffles-galore.com/uploads/1/3/1/6/131637570/b46d65adcef53e5.pdfIn PDF document text
    • http://bebul.affirmativeresearch.org/uploads/1/3/1/4/131437089/wefojibu-fenijefaxex-pedato-lurudavipoxu.pdfIn PDF document text
    • http://zofemafu.baketoplay.com/uploads/1/3/1/4/131408159/tizil_laluja_kurutor_zidosekoririx.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/1/0431/1010/5244/files/candelaria_tenerife_information.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/ruvidekeva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/padma_bhushan_award_winners_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6750/6841/files/negimikegadusolopule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1814/1347/files/newivinetodeladidisoru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7546/0517/files/josofixobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/jurnal_psoriasis_vulgaris.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0650/8701/files/nawupomilew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/girotimovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2969/9482/files/tagaditasezewedubus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0684/4315/files/biwojesezetunuriladax.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 5

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_off00004bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BAD 5064 bytes
SHA-256: a3316271b1fede099c0caf68661435292ced69fec66c1f590647ba7aebbf8be7
font_01_sfnt_off00005cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD2 9464 bytes
SHA-256: 7b92329521e65eaf57f69eca513713858c6cd76bdd209622882d4cd82d2d4319

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