Malicious PDF — malware analysis report

Static analysis result for SHA-256 521cfee3ed82023f…

MALICIOUS

PDF

44.8 KB Created: 2020-08-05 09:39:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6fe0c116654a6f158da2938abe089b8c SHA-1: 8374477d4e484f99791997b1d9f9e9972aab31e7 SHA-256: 521cfee3ed82023f6b73191f662193c4e0ac2ae80c003db2163213a93477a9da
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=achilles+tendon+exercise+pdf'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The document also contains a mass external PDF link farm, with many links pointing to Shopify domains, suggesting an attempt to appear legitimate while hiding the malicious redirector. No scripts were extracted from this sample.

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=achilles+tendon+exercise+pdf In PDF document text
    • http://files.ktshepherdpermaculture.com/uploads/1/3/2/7/132740377/lozulos.pdfIn PDF document text
    • http://files.fraserlegendsfishing.com/uploads/1/3/0/7/130740444/cab22b79d7.pdfIn PDF document text
    • http://files.similarjones.com/uploads/1/3/2/6/132696063/jokepapufonebumoza.pdfIn PDF document text
    • http://files.ppischoolpics.com/uploads/1/3/2/8/132815752/631828.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5656/1318/files/40151407548.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6908/6623/files/88573142180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9822/5320/files/activist_insight_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5344/0414/files/diguxegedizupivusewiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/zejifoniredaxavowezawew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/82223332940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63908687591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6286/1730/files/paponevigeno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4895/0170/files/sususopatuwuvopunewajibez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1036/6362/files/4100532073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/42280788145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/wuketej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2541/5843/files/dnd_5e_paladin_oathbreaker.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F5 4876 bytes
SHA-256: 02dc3fd7573e7b52a128f5ee0240007446d219ad8bc152f578a3fd0cd6b80e04
font_01_sfnt_off00007675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7675 9892 bytes
SHA-256: 33313fa251010e615dc239b42e3e8b554ed7d4ddeb2aa982846ce52117e2251a
font_02_sfnt_off0000983d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x983D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361