Malicious PDF — malware analysis report

Static analysis result for SHA-256 77b318bce1cced3a…

MALICIOUS

PDF

64.9 KB Created: 2020-07-31 16:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d5c604894679f8e9314acd61f3fe5ad8 SHA-1: b8615507b95a40cb4a70cb9b40712abf20fbcd37 SHA-256: 77b318bce1cced3ac3a5abfeda96725165aa087b43f760cedd9480f09afa79df
214 Risk Score

Malware Insights

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

The PDF contains embedded links and a document body that attempts to masquerade as a news blotter, directing users to a malicious redirector. The presence of multiple PDF links and a critical heuristic firing for malicious redirector infrastructure strongly suggests a phishing or malware distribution attempt. While no scripts were directly extracted, the nature of the embedded links and the ML classification indicate a high likelihood of malicious intent.

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) or Microsoft license-boilerplate 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.ru/pify?keyword=rockland+journal+news+police+blotter In PDF document text
    • http://files.whatwouldateacherdo.com/uploads/1/3/1/4/131454238/3e653d2cf4.pdfIn PDF document text
    • http://files.mediocreatbest.net/uploads/1/3/0/7/130739316/limokegev.pdfIn PDF document text
    • http://files.ravenshuskyhavenandrescue.org/uploads/1/3/1/3/131398059/4085973.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/1/0433/0687/7080/files/jidaxuno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1238/2116/files/fojobekeligorivuvawagesaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5792/9621/files/59498242127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/furagesefibajewaned.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/46872199974.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0403/5221/files/12186816050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3006/8894/files/98313948720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5561128363.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9186/8313/files/regejuponunigoti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/kosudofelar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1721/3851/files/sirawizejibarabazerixogi.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_off0000c14a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC14A 5444 bytes
SHA-256: de33ce238c0e3103b22ba62da6ae44873f33a236a8a6fe5164b62b135fd9fd3a
font_01_sfnt_off0000d3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F3 10140 bytes
SHA-256: bdf9a359d3d6d561cb99df41cbe8c3d8bf71d67f8304f1cabd26de3213f52d60

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