Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bcd6ec93fc0a3ba…

MALICIOUS

PDF

49.5 KB Created: 2020-08-04 01:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c4896258258c5c008c5fa832d34e8c24 SHA-1: 2fbde4c247189ee324c0a9bb24e2b9a24353b4f6 SHA-256: 4bcd6ec93fc0a3baeaf50f6e795d93642a7304b175f0a320a8bad8d16bf15e67
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'https://ttraff.cc/pify?keyword=aptitude+tests+pdf'. This indicates a likely attempt to redirect users to malicious infrastructure. The document body, though heavily obfuscated, contains text fragments and URLs that reinforce the lure of 'aptitude tests pdf'. The presence of numerous shopify.com links suggests a link farm used to improve SEO for malicious content.

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=aptitude+tests+pdf In PDF document text
    • http://files.alextechstudio.com/uploads/1/3/1/4/131437490/583d61a.pdfIn PDF document text
    • http://jebujisi.meganartandphoto.com/uploads/1/3/1/4/131409200/wozimet.pdfIn PDF document text
    • http://xekirow.vandrej.com/uploads/1/3/2/8/132815002/nixep.pdfIn PDF document text
    • http://files.redhawktheaterbc.com/uploads/1/3/1/3/131381095/najusuvufipade_ruzon_tebuzogodotede_revalizo.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/1/0432/3488/5792/files/21494120885.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4796/0232/files/90587690483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7777/1162/files/tugadejabuvalatel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1016/9759/files/29579914193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3438/5303/files/fences_product_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6547/3189/files/69603695589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7512/5923/files/vezaputijimanukek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4429/6088/files/32509170471.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/bexemujavalubosuzijetuvex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1373/4563/files/bella_s_lullaby_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8523/3304/files/kemogidemubo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBF 4352 bytes
SHA-256: bbc8376790da5691c98e600c5efbc9e508b07979858d6ffb8139780d07b8d69e
font_01_sfnt_off00007e96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E96 14348 bytes
SHA-256: 9fc8242b706c47b00ad110eb277f64796573899267a226733f8b9397b15d7c2f
font_02_sfnt_off0000ab57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB57 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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