Malicious PDF — malware analysis report

Static analysis result for SHA-256 6144b06214bafcdd…

MALICIOUS

PDF

36.3 KB Created: 2020-08-19 14:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8e43611095cd5f5697c2f2576cadf852 SHA-1: 5a2e4a14fb6131ac9b55789821b7122d2aaaac6e SHA-256: 6144b06214bafcdd9525d6d8a85192c5923c6a2ed6d640d961b9d1ad22dc7d34
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting it is a worksheet answer key, a common lure for phishing or malware delivery. The ML classifier strongly indicates maliciousness, and the presence of redirector links supports a malicious intent to direct users to potentially harmful content.

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.ru/pify?keyword=commas+in+dates+and+addresses+worksheet+answers In PDF document text
    • http://bufopi.kimmydee.com/uploads/1/3/1/8/131871699/5724574.pdfIn PDF document text
    • http://files.wildridecreations.com/uploads/1/3/2/3/132303270/d061640baef9.pdfIn PDF document text
    • http://kekalep.crowdedbedcreations.com/uploads/1/3/0/7/130738970/nixerox_badezolipifijij_wafiju_remofera.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/1/0434/6894/7616/files/fogomesenidumutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5271/9515/files/77017338861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5058/1662/files/rita_form_17.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0056/9766/files/58589138961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6495/0946/files/99722029522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7614/8641/files/electric_power_distribution_system_engineering.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xibirinadinabamagumib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0264/2075/files/banking_awareness_by_arihant_publications_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7022/5558/files/41760116355.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 2

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_off00004ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FF9 5092 bytes
SHA-256: 8ba734bee664396a22620667ae8c64ce979c1aa024002912f0db537bc35c6310
font_01_sfnt_off00006123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6123 10308 bytes
SHA-256: a9eebaed569ea30af3639f78e93f9322b03a2b385365c67b16f4cc30d9585346

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