Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cf8240522c0acd9…

MALICIOUS

PDF

40.7 KB Created: 2020-08-10 06:08:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 224c31f97cd72d7ea05897bedcea3dd5 SHA-1: 58f2570b4e86729abd31d14377fe1747022e6fb6 SHA-256: 3cf8240522c0acd908651feac01257b51fb5c147682b65153118c20f61f4b9a4
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=nervous+system+of+arthropods+pdf'. Additionally, a PDF link farm heuristic indicates the presence of numerous external links, with the first being 'https://cdn.shopify.com/s/files/1/0435/0859/6900/files/jolejoziwu.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and the malicious URL, suggesting a phishing or malware delivery attempt.

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=nervous+system+of+arthropods+pdf In PDF document text
    • http://files.maiawellnessstudio.com/uploads/1/3/0/7/130776735/nibuzexabagubom.pdfIn PDF document text
    • http://files.impunity.site/uploads/1/3/1/4/131438449/xejupufazaturiv_nuduwaxokuv.pdfIn PDF document text
    • http://files.bluthbio.com/uploads/1/3/2/6/132682134/gaganudexuwa_jimufabeban_pepagekelafawi_wadodaferosak.pdfIn PDF document text
    • http://files.pavlovsphotos.com/uploads/1/3/0/7/130775350/mifewibizekeju.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/1/0435/0859/6900/files/jolejoziwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9799/5941/files/sabijowimeripomoruwumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6895/6565/files/78988957507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/setixinojed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2401/2696/files/low_back_pain_exercises_for_elderly.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3004/5084/files/lipomilapuwebew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2521/1296/files/52251408743.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0980/8280/files/ginezazamodeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4016/2460/files/14382377911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7199/5033/files/36541878873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0221/5074/files/78406398151.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_off000060f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F0 5380 bytes
SHA-256: b927781e1c6d690ff8f0a98ec219f1c956385ee43ee8fc6854afe8ecbd187b80
font_01_sfnt_off00007324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7324 10456 bytes
SHA-256: 9e0fc51b1c56a13c52ed36e4aef91ab88314833930badc24d99195adef81a74f

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