Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b8874eda01f3c03…

MALICIOUS

PDF

33.3 KB Created: 2020-08-10 01:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 85e4344fe4f955b50a5034e38218dffc SHA-1: c8a7d6addd42827332a4ba32ce0f5ee117074d07 SHA-256: 1b8874eda01f3c03787c346ebd53372c7a3fdb02aef0c4c0c42ec4e2a8e7a10d
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The document body, though heavily corrupted, contains the URL 'https://ttraff.cc/pify?keyword=letter+tracing+sheets+pdf', which is also present in the heuristics. This indicates the document is designed to trick users into visiting a malicious site under the guise of providing tracing sheets.

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=letter+tracing+sheets+pdf In PDF document text
    • http://files.k10research.com/uploads/1/3/0/7/130775493/kalutulazaw.pdfIn PDF document text
    • http://files.bethanyscottsdale.com/uploads/1/3/0/7/130738657/tovaduretiloler-susaminuk-vimojolesuji-zefifege.pdfIn PDF document text
    • http://files.garykearneyart.com/uploads/1/3/1/4/131406505/luzejafokedexomeki.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/1/0438/6127/8870/files/veliwoxelesadeberox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6211/6008/files/patarakewijuxasokug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5456/3477/files/pikutusit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34597476450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0710/6462/files/shakespeare_sonnet_55.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0340/3678/files/pokemon_sprites_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9301/7247/files/iseki_tractor_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0490/8952/files/64064736460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1883/0503/files/business_development_manager_duties.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4495/3509/files/36074258042.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2051/7537/files/firdous_physiology_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5083/5876/files/88899128530.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_off0000449a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x449A 5324 bytes
SHA-256: ec7467eda0986f022090136b3351876f1d94957d33ebe4a4b99588af4c8e4811
font_01_sfnt_off000056b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56B3 9956 bytes
SHA-256: e0695bdeb775d0a454e8a83483f56f955dd99313c8318008fd96c7aff3d328e5

Open this report in the interactive analyzer, or submit your own file for analysis.