Malicious PDF — malware analysis report

Static analysis result for SHA-256 f31dde3fe11461c6…

MALICIOUS

PDF

40.9 KB Created: 2020-08-11 21:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0fb65dad3fecbfb450ad1ad50f663b55 SHA-1: 6b6cba7a7691f52f493bc41dee1fb7aa9dddb072 SHA-256: f31dde3fe11461c6ad9d17b011cdea2d3441bdf0c70d2018f9fbd5000e1d4836
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the string 'https://ttraff.cc/pify?keyword=belajar+coding+dasar+pdf', indicating a lure related to 'learning basic coding pdf'. The presence of multiple Shopify URLs, some flagged as benign and others unknown, suggests a link farm or SEO manipulation tactic to distribute the malicious PDF. The ML classifier strongly indicated maliciousness.

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=belajar+coding+dasar+pdf In PDF document text
    • http://situj.sdpermits.com/uploads/1/3/0/9/130969762/82d8e4.pdfIn PDF document text
    • http://files.lilachbar-ami.com/uploads/1/3/2/3/132303099/xidisev.pdfIn PDF document text
    • http://files.singersandactorsworkshop.com/uploads/1/3/2/7/132740218/mubazaxumadajag.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/1/0447/5843/3943/files/abakada_tagalog_words.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9118/2243/files/muwomuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/4458/8959/files/capitulo_etnico_acuerdos_de_paz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6424/5925/files/approaches_to_educational_research.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1883/8435/files/53988576444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/4741216720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2466/2173/files/gadulidirilutivuvebidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/palijafazikerudivodona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8188/4063/files/medical_case_study_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8447/1710/files/72007591258.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 8

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_off000061b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B8 5448 bytes
SHA-256: dc544237d443af2e4e49adad9eb5b1e86f475e89d7e27e63be4c3ba4f2f2f31e
font_01_sfnt_off00007457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7457 10136 bytes
SHA-256: 3e3606c9874b3fe2c35db116be9cd72ac721c6f1fde36fa1de2bc0d578017d9c

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