Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfcd61fcd72b4364…

MALICIOUS

PDF

42.1 KB Created: 2020-08-04 21:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8a710ecd2b558a8d67e280c06ed1ae7c SHA-1: 510530b61b57327f449abc28603659a4d5e8bbb6 SHA-256: bfcd61fcd72b436485e027992cf4b43ba7559f21f90a8652ce62b37023c77fa0
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple embedded links, with a critical heuristic firing indicating these links point to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics. The presence of a 'callback phishing phone lure' heuristic further suggests a social engineering attempt to trick the user into interacting with malicious content or services.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=accord+salud+210+cartilla+pdf In PDF document text
    • http://fosex.thisdreamersrealities.com/uploads/1/3/2/6/132696111/5f77e5.pdfIn PDF document text
    • http://files.diypaintguy.com/uploads/1/3/2/6/132695633/1049055.pdfIn PDF document text
    • http://goriviwow.christopherwrench.com/uploads/1/3/1/4/131438477/2362604.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/1/0428/4012/9692/files/padomojuravuzagagon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5496/4631/files/luted.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5954/3192/files/24249289191.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2568/6951/files/rojimaguze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1109/6221/files/72034944975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5122/0120/files/44097572437.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/nuvazogitudezisabuwitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8434/1657/files/58476340959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7135/7596/files/42491923536.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8790/4422/files/kinds_of_adjectives_worksheet_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/69284431315.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8398/7096/files/podexufubogidutawatatik.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 6

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_off0000641c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641C 5464 bytes
SHA-256: b3c966899c746f7b26ae06f4336412815a2eda5c84186956e4a118ec68d8b859
font_01_sfnt_off000076c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C6 10800 bytes
SHA-256: 595e98df55862bd4a068206f57361ba9325f5aea99159e044c89826f866eb992

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