Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c9c89da7267a217…

MALICIOUS

PDF

33.1 KB Created: 2020-08-19 21:40:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4a12f5c28122b81473aaa367ccd8efdc SHA-1: b87d22fc168732b89c591b5ccf4e7711f7f4d5e9 SHA-256: 1c9c89da7267a217fb8caa9ee298836548eb6a23a9d4f378998528d5613df2d1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing for a PDF link farm. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=serial+couple+pic', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is a primary lure. The presence of numerous links, including the malicious redirector, indicates an attempt to lure users to malicious content or for SEO manipulation.

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=serial+couple+pic In PDF document text
    • http://files.therealmommy.com/uploads/1/3/0/7/130739067/mapewinikuwofe.pdfIn PDF document text
    • http://files.carolinamountainreefs.com/uploads/1/3/1/4/131406736/noxovez.pdfIn PDF document text
    • http://files.redqueenlitmag.com/uploads/1/3/1/3/131380001/18fbcbdfb5.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/1/0449/1676/8923/files/rhetoric_logic_and_argumentation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/65155335522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/revaxerinutasidimexifebar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4389/5966/files/64029781158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6080/4249/files/oxigenio_dissolvido_na_agua.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8900/2645/files/nissan_connect_services.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/admin_officer_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/prot_warrior_stat_priority.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4843/3829/files/14794910539.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 7

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_off000046c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46C7 4852 bytes
SHA-256: 91641489252ba92e2d33715b6d25b3f4995becbac3834199b0969d1fb96063ff
font_01_sfnt_off00005748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5748 9668 bytes
SHA-256: bd64ea2625e68d08be1b1e523992337832a8597503b83e1a2f1554d796dfebe8

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