Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf708d23b81f9ac3…

MALICIOUS

PDF

42.2 KB Created: 2020-09-14 03:37:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1b81408ec21474c93f3deac63c60e706 SHA-1: d5537fbaa90ecad277279287e2c8a75ff7358fe0 SHA-256: bf708d23b81f9ac33ca3868696e536f4bbed23fa5c135dbe3a972cd197b0a646
222 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains embedded JavaScript. It also features a critical heuristic firing for a malicious redirector link pointing to 'ttraff.club'. Additionally, it exhibits a PDF link farm, with multiple links to external PDFs, some hosted on Shopify and others on 'therhodeislandecho.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=liver+and+potato+enzyme+lab+answers', suggesting a lure related to lab answers.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.club/wix?keyword=liver+and+potato+enzyme+lab+answers In PDF document text
    • http://files.therhodeislandecho.com/uploads/1/3/1/4/131407980/e48942ed3a8d280.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/1/0429/6327/1833/files/rutazexanewilevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7557/5709/files/66688461365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/captive_prince_volume_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9386/8187/files/fusug.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/19103d_9beecb977d114c73824ddea2afc4fa99.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0df15e_b729d0a7d6d048e4abe66adea9a821d5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/34e21e_d19880ab4e1040c9bd7a189fa5f49943.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8bf3fc_5d574c0c77d04a6ba1ec13e43e98f732.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_6c5cc68d24c24a40af5747c6cc38b8af.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f3cddb0cad2f4dfdb061d0873098eabd.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_off000065d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D2 5492 bytes
SHA-256: 8479e169b2be52f90158994b0eca6a7ec288dff08e1c96df49c72af94d284aea
font_01_sfnt_off00007888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7888 10440 bytes
SHA-256: dd519016998a3ac4d28b85b091c27f71f6448a78044c4ed0974ea93284e3ef68

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