Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c85254e16492ee5…

MALICIOUS

PDF

71.4 KB Created: 2020-09-17 08:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 85f742d9941cfbdb8008ff107ff3f9c5 SHA-1: a7cda5b5541f19ef5d9897b3396b39fdc9276e35 SHA-256: 1c85254e16492ee50346619d61293a5de6f171ce2a78701aef98034243fb1bf7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external resources, a technique often used to obscure malicious intent or to create a link farm for SEO poisoning. One critical heuristic firing indicates a direct link to a known malicious redirector, 'ttraff.link', which is used in conjunction with a keyword related to academic content. This suggests a phishing or malware delivery attempt disguised as an academic resource.

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.link/wix?keyword=edward+said+orientalism+summary+slideshare In PDF document text
    • http://files.danvilletrikappa.org/uploads/1/3/0/8/130874067/cba5cd008.pdfIn PDF document text
    • http://rotawegaz.treehousebuys.com/uploads/1/3/2/7/132710677/1a9c86403cb04.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/1/0434/7795/8822/files/bovopofaxomajoriwolonasir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/oxford_bookworms_library_stage_6_the_woman_in_white.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/fobizolugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4329/8207/files/.pdfIn PDF document text
    • https://487e2efa-8b3a-4c19-b088-d7eab8f485e8.filesusr.com/ugd/69695d_b6efb9b044db4badba983f0987557f53.pdf?index=trueIn PDF document text
    • https://a4135a05-8eae-489a-b644-94acbe6750fb.filesusr.com/ugd/a18601_c045e24f02734dbf85b40f96b5f24572.pdf?index=trueIn PDF document text
    • https://8df40ebd-13f0-4e63-86cd-1a9f98b7a360.filesusr.com/ugd/0e6328_bd25c6eb5c82435db112bb642efa627f.pdf?index=trueIn PDF document text
    • https://f3690bef-1d66-445b-bda2-c3f3c9bb2fe0.filesusr.com/ugd/aa14a9_fbe581f6259b4074a772611d8ab50d49.pdf?index=trueIn PDF document text
    • https://c7323f14-8c6f-43f1-b54a-6b2a61d290fb.filesusr.com/ugd/43d598_110e78dbb8e24bc8bc5e8e67cc7b054f.pdf?index=trueIn PDF document text
    • https://b5b3e5c8-5807-4c85-8f27-8b7d0e237dac.filesusr.com/ugd/0b46e6_fad31ae4cc0142ae94257b70600cef2c.pdf?index=trueIn PDF document text
    • https://b63e9ec7-6fdc-44a9-bcec-1842a7eeb0e8.filesusr.com/ugd/105a8c_02867643e7c54439882b858b3679fb24.pdf?index=trueIn 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 1

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_off0000daf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF6 5216 bytes
SHA-256: 811b7e029f9a9fe54a90d6658833c707df50f11cd5d4b56f4a6be60a9833f057
font_01_sfnt_off0000eca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA0 10516 bytes
SHA-256: 7853ecf2206f1d1843a57265625858b7a93b61c9e0bab5ad4212e71b704dd960

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