Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1bc37a98786194d…

MALICIOUS

PDF

41.1 KB Created: 2020-08-08 19:30:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4b265a3413ad920439ced2bf42b9e147 SHA-1: b8be85d001aeaee9b4082d7f5946bb947d1af6c3 SHA-256: e1bc37a98786194d833d55c0b0990222c1e61d17d3df55e5d5aedbcf2cf6bc9e
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The PDF appears to be part of a link farm designed to drive traffic to malicious infrastructure.

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/pify?keyword=capacity+planning+and+control+in+operations+management+pdf In PDF document text
    • http://files.specialedu4parents.com/uploads/1/3/1/4/131438616/847184f3d2.pdfIn PDF document text
    • http://newux.theballroomdanceprogram.com/uploads/1/3/1/8/131856158/7872277.pdfIn PDF document text
    • http://files.utrgvalpfa.org/uploads/1/3/0/7/130775917/8448382.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/1/0428/9649/0663/files/49532191002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1019/5605/files/49348304440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/27308708343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/kigepefilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6640/6550/files/13469375425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/rofiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/kufewojififovenijiwegix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6319/7347/files/52564047856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0459/1254/files/rejinelovupazizenalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8179/files/puderibajalilinipukibeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8039/1585/files/panupamikapikux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7699/3702/files/python_game_code_snake.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 4

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_off000062af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62AF 5484 bytes
SHA-256: e85d3ede9cfa48015c0da527858506fcb52a60afa43af6f4c996b431a0ca1ef0
font_01_sfnt_off00007542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7542 9884 bytes
SHA-256: 254c4e3396f516bf3194228c2881afbc930bc18a1aec70f73787b0f259100975

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