Malicious PDF — malware analysis report

Static analysis result for SHA-256 a52616481e5f6a0e…

MALICIOUS

PDF

62.3 KB Created: 2020-09-16 05:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 01fd54858f65b24d7ff91384bb4a6177 SHA-1: e79d51a2782e994b2f1f40ac5177c15422e3b71b SHA-256: a52616481e5f6a0e7f411f275593f708465ccd8bfcdfe3c495d8420f4a21c5dd
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/wb?keyword=slippery%20jack%20mushroom%20look%20alikes'. Additionally, another critical heuristic indicates a PDF link farm, with numerous external PDF links. The ML classifier also strongly flagged this PDF as malicious. These indicators suggest the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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/wb?keyword=slippery%20jack%20mushroom%20look%20alikes In PDF document text
    • http://files.shimritlee.com/uploads/1/3/0/9/130969545/f3c404dd026ef0.pdfIn PDF document text
    • http://files.simplyburtons.com/uploads/1/3/1/1/131164027/wazunibuzunepe.pdfIn PDF document text
    • http://muxok.calgaryboxingclub.net/uploads/1/3/1/3/131380213/241130cb7cc770.pdfIn PDF document text
    • http://files.mkhventuresdb.com/uploads/1/3/0/8/130813364/173f724d.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/0ad6c7_aa641bca4a6d454d93890b3c3ff95a12.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2889/6161/files/cloudformation_template_ec2_instance_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0069/8792/files/particle_clicker_hacked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6472/1562/files/despacito_two_violin_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4711/6185/files/36753504750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/fulasasavosidotaxuvisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80170273674.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 3

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_off0000b5be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5BE 5516 bytes
SHA-256: 3a79ab85ed3f6ae8b5c30dc19d052f9b5da4dd1e2171884b04d2defb9d38d5dd
font_01_sfnt_off0000c85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85F 10472 bytes
SHA-256: 4aa39bf4be108b3c43254bd82453073f9b914fb947a312d0b593aa4766a7fe84

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