Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb306a51a2b1850…

MALICIOUS

PDF

39.0 KB Created: 2020-08-17 01:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5bd6cc9ad89b3b0c08b3432e19da9126 SHA-1: 0e39f0338fe68d34d9abda877cc97534e3482c41 SHA-256: ffb306a51a2b1850cdaa3d2a790c2f09ed83aac92a13aa21c29aba5ce27095c0
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a redirector to a malicious domain, disguised as educational worksheets. The primary malicious link is https://ttraff.com/pify?keyword=following+written+directions+worksheets+for+middle+school, which likely leads to a further malicious resource. The document body is heavily obfuscated but contains references to the malicious URL and other PDF files hosted on Shopify. This indicates a link farm or redirection tactic to distribute malware.

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=following+written+directions+worksheets+for+middle+school In PDF document text
    • http://files.ramirezromerolab.com/uploads/1/3/0/7/130739043/dadasux.pdfIn PDF document text
    • http://files.freedomgundogs.com/uploads/1/3/0/7/130775465/vajonogaxakubumo.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/1/0432/3803/1518/files/keborudufosovakasazilul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/84345371528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/12739676953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/4855/3887/files/medio_isotonico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5211/3820/files/dafaziridadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5838/8374/files/nobigukuwetaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9495/0556/files/kudomep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6142/7876/files/laxuxagivafejoferusaluno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/74131256410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4437/1613/files/promissory_note_in_telugu_words.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 1

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_off00005930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5930 5336 bytes
SHA-256: a6ec3996989e65a01477fdcec62bf3fac202417a8e94c2260cc57ae639673b56
font_01_sfnt_off00006b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B49 10404 bytes
SHA-256: 3cc16c0e88ccbcdbc2bce3df60a75f4c11a377fc371ba8effd40b122b3405f76

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