Malicious PDF — malware analysis report

Static analysis result for SHA-256 738879e578da89f0…

MALICIOUS

PDF

47.3 KB Created: 2020-09-09 01:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 683da33ed78e87d1c208684dac2137dc SHA-1: e72aedccbd074efa30882947e0ba6e1329849096 SHA-256: 738879e578da89f03d755eabe190bf24f2a81962a3f226dd658d250832b46790
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector at 'https://ttraff.me/wix?keyword=nccn+guidelines+basal+cell+carcinoma+2018'. This redirector likely serves as a lure to phishing pages or malware downloads. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify-hosted PDFs, suggesting an attempt to create a link farm or distribute content via seemingly legitimate platforms. The ML classifier strongly indicated 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.me/wix?keyword=nccn+guidelines+basal+cell+carcinoma+2018 In 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/1/0434/6091/9446/files/96661069170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7788/6371/files/balance_sheet_sample_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29942388251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/wemomewixipewubab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/8945/3217/files/50459461546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2190/0696/files/texas_130-_u.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/mesob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2458/7679/files/6451848956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/areca_nut_farming_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/el_acoso_escolar_libro.pdfIn PDF document text
    • https://medlineplus.gov/skincancer.htmlIn 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_off00005e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E63 5888 bytes
SHA-256: 0687c542c9e1f22a6c6daae3920c5f905e5084c9340e0cdd1a06b733735fe739
font_01_sfnt_off0000725d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x725D 12744 bytes
SHA-256: d14b22045d7b3cdafae53e769a5bbd72943ab9a23aa617df0596c871be6616c6
font_02_sfnt_off00009b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B1D 16132 bytes
SHA-256: d9b012042df5fe8dc074c42eae0f7627b15178249d85eb70dc7afc452d134ec7

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