Malicious PDF — malware analysis report

Static analysis result for SHA-256 e88047c1e891e7ae…

MALICIOUS

PDF

44.4 KB Created: 2020-08-01 06:27:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c771f4f26ebd14ea805f1eca96a28a34 SHA-1: feb33727e469ff9d1a7dce2a5b88df72e16212ea SHA-256: e88047c1e891e7aea9c4830855530c5bd2a45be16b696d0d6076378f92d04c8a
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDF files, characteristic of a link farm. One of these links, 'https://ttraff.cc/pify?keyword=the+longman+reader+pdf', is identified as a malicious redirector. This suggests the document is designed to lure users to malicious infrastructure, potentially for further exploitation or phishing. No scripts were extracted, and the document body was heavily obfuscated.

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=the+longman+reader+pdf In PDF document text
    • http://files.peterpax.com/uploads/1/3/0/8/130813269/8040566.pdfIn PDF document text
    • http://files.comptekcomputers.com/uploads/1/3/0/7/130775245/kulonadisawonexawa.pdfIn PDF document text
    • http://files.sskanz.com/uploads/1/3/1/4/131452838/tojogid.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/1/0428/9835/8432/files/81667611697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6068/1111/files/matti_di_khushboo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/xigupukavunux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6120/6422/files/8081581551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9002/7430/files/tuxulifudobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/kisanux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1846/7997/files/75212589104.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/64875497202.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6043/5871/files/47305162279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/94510482411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7388/0739/files/32757134962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/20232572263.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_off00006455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6455 5224 bytes
SHA-256: 43125995198913eb188979492720680d2e90b570b2ad2839c823f6b62670d19f
font_01_sfnt_off000075f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75F0 14536 bytes
SHA-256: 9bc932dbdc866e43612f46fd58c20e47d888150552ab4d87ce84b141362f6c23

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