Malicious PDF — malware analysis report

Static analysis result for SHA-256 a485e9c57863e071…

MALICIOUS

PDF

47.5 KB Created: 2020-08-16 12:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 26f8e7070ee99a2dcb3757b5692fe981 SHA-1: 1b114c39b4fa1aa314c1ea9a1db07dd670228195 SHA-256: a485e9c57863e071c88f676ed0c89ac87a4a87733cf6a6349b63b7afe1cbe965
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing indicating a link to a known malicious redirector. Another critical heuristic identified a large external PDF link farm, with the dominant host being cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and URLs, suggesting an attempt to disguise malicious activity.

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.com/wb?keyword=makalah%20biokimia%20metabolisme%20karbohidrat%20pdf In PDF document text
    • http://files.dragonfly-books.org/uploads/1/3/2/6/132695692/0a56f640d.pdfIn PDF document text
    • http://files.matthewlmcguire.com/uploads/1/3/0/9/130969682/sebusidu.pdfIn PDF document text
    • http://files.josiediamond.com/uploads/1/3/1/6/131606673/vaparamizivudi.pdfIn PDF document text
    • http://files.growingupguinn.com/uploads/1/3/1/3/131380163/7046720.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/1/0428/9291/8937/files/pinnacle-_video-_transfer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4945/0663/files/rezopufonumabum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5736/4638/files/11890849238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8223/6583/files/zonukulurorexadirurego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7986/8324/files/voxulezoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/allen_bradley_powerflex_525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/sazuwokinom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2253/8136/files/nokaxegopekoxoruxaxubawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/669297692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/buzaxajosewobiwijuliruxad.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 5

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_off00007b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B46 5488 bytes
SHA-256: a851750806e8fac81c78e554a1b6d42569f5f49de4403acb96beb23e30a6805e
font_01_sfnt_off00008dc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC9 10552 bytes
SHA-256: 47f83ffaf702041686c670fc6eca2cbd7d8f7bf3f558e441472b110ef15c6050

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