Malicious PDF — malware analysis report

Static analysis result for SHA-256 343ac4297a7de5e8…

MALICIOUS

PDF

39.3 KB Created: 2020-09-11 20:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 43e1e6b30fed5b07123228efc1772aa3 SHA-1: dc11615a235fe523a8eda8a9bc40b102f9315cfc SHA-256: 343ac4297a7de5e81b1b8c4f3ca339f16325f95a6aabcf5466e6b11ac379a2a1
134 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified as a redirector for phishing or malware distribution. The ML classifier strongly indicates maliciousness, and the presence of multiple suspicious URLs reinforces this assessment. The document body, though heavily obfuscated, contains a URL that appears to be part of the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.club/wix?keyword=opposite+to+emotion+action+worksheet+pdf In PDF document text
    • http://files.asliagirbas.com/uploads/1/3/0/7/130776841/07f27bfa0f9527.pdfIn PDF document text
    • http://rutal.toddphillipsmusic.com/uploads/1/3/1/3/131379510/vofajafavupudi.pdfIn PDF document text
    • http://files.rhiannonlisettehenry.com/uploads/1/3/1/4/131410747/gulapurunixab.pdfIn PDF document text
    • http://files.growingwithbrock.ca/uploads/1/3/1/3/131381374/8586130.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/2813e2_765a7a78a93e48b58ab40ad5e02035ca.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a4ea6c_38cbf4cc8fc34b43bbed96327b464516.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/35e1ce_c29cd8ba6d7f46598a53f54e678fc145.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/857e61_5cccb0c2caca4859865db79aff41fcca.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3e0cb9_a48cbfcd0b57490d9371be5c382ffe07.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_off00005b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B59 5544 bytes
SHA-256: a6dd437199a14256def7445ef33316b81ec4615c1b9de7bd940d671689188690
font_01_sfnt_off00006e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E12 10080 bytes
SHA-256: dc4640940b542277a2675e244297105b8b25343327192eb0291819362874bbee

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