Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa615c4951b8d04…

MALICIOUS

PDF

48.1 KB Created: 2020-08-17 15:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 11d712fbbbbbf8651f978f64cc607379 SHA-1: 9d19b8bdf4fa9e315ad89e87da37763d5ecd1120 SHA-256: 0fa615c4951b8d04451aba1ac1c2366e3f0e64ef69fe8b5c78c4cc63ed730d7c
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which are part of an SEO link farm designed to redirect users to malicious infrastructure. The primary redirector URL identified is ttraff.ru, which is flagged as malicious. While the document body contains garbled text, the presence of multiple links and the ML classifier's high confidence score indicate a malicious intent to direct users to potentially harmful content.

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.ru/pify?keyword=fishing+report+colorado+river+matagorda In PDF document text
    • http://nolavedok.mx.reinventing-reality.com/uploads/1/3/0/8/130874493/81e37936.pdfIn PDF document text
    • http://punutifu.berjarealty.com/uploads/1/3/0/7/130775934/punogulenazuw.pdfIn PDF document text
    • http://files.12250parkway.com/uploads/1/3/1/4/131482821/fcc42d3bd09d09.pdfIn PDF document text
    • http://files.scw9.ca/uploads/1/3/2/6/132682905/2cb92fe.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/1/0439/3356/5096/files/10681126471.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6779/1765/files/59548874169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9385/9231/files/advanced_english_grammar_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5225/3863/files/bonafide_student_certificate_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9791/3512/files/20869208132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9185/3479/files/98879436844.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5818/2809/files/bolt_and_nut_torque_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/55486856422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/45725027578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sujufizolotedugogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1615/1455/files/komigawoniridomaviveda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2004/9822/files/15008340802.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6615 5500 bytes
SHA-256: 3acc928a667f1be207a75d2588ab179699ab0d0e109d8bbdc9ff22240e003e7c
font_01_sfnt_off0000789e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x789E 10680 bytes
SHA-256: 0233cdd4cd57d223c0fa567d571b4b777b410d51223a2611d408106dbf28bbf8
font_02_sfnt_off00009d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D77 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660