Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf1cdd1691c1ff0…

MALICIOUS

PDF

50.6 KB Created: 2020-08-28 15:31:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c4aa4d391cf8a653aba1742336352f03 SHA-1: 03a31780712e8e98fc0c8c81b8a3bc78f4a8edf8 SHA-256: 0cf1cdd1691c1ff043e45ba1bbd305565f0de0fef4f0e272d8eebd7589957ed2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one to a known malicious redirector, ttraff.com. This redirector is used in conjunction with SEO link farms, suggesting a phishing or scam campaign. The document body, though heavily obfuscated, contains the same redirector URL, indicating its central role in the attack. The ML classifier also strongly flagged this PDF as malicious.

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=bts+wings+mp3 In PDF document text
    • http://files.jlongkandb.co.uk/uploads/1/3/1/6/131606368/da1337258866eff.pdfIn PDF document text
    • http://kamevom.nickburbey.com/uploads/1/3/0/7/130739786/d13ac589.pdfIn PDF document text
    • http://bakunufof.hislove4us.com/uploads/1/3/1/4/131408027/rurizudofobiro.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/1/0434/1514/2551/files/kidijigevekanogeluvude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/66357441331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8870/7738/files/delhi_bye_laws_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6385/2708/files/novartis_annual_report_2005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6911/1461/files/anemia_segun_oms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7997/5590/files/40563781878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/balukavijenizezeboras.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7244/6873/files/86373505689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0836/8545/files/culture_and_psychology_6th_edition_p.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6231/9517/files/sequencias_logicas_raciocinio_logico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nepel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/sesumuzimadazexaxup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3671/2861/files/98179920471.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DA 7280 bytes
SHA-256: cac63dc4c02a5447ee44c96eb69806624bade0b640de2f74dec90e07611c553c
font_01_sfnt_off000079a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A3 4668 bytes
SHA-256: 4d572b44b8a92cc574ac1898d4546b895e2bdf89edb407b319795bab5edf3e67
font_02_sfnt_off0000897a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x897A 11044 bytes
SHA-256: 77252fbf967db10f8c79c1b398a7de9a7c6de3190af9cb41f7457f14a276bbd1
font_03_sfnt_off0000af4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF4E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361