Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e51c4088e17de1…

MALICIOUS

PDF

43.8 KB Created: 2020-08-08 19:44:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 94923bd4f8029286f7b8ac4786f00ac2 SHA-1: 3adc5612bb89c9254c10cf321fb0e4e227450b65 SHA-256: a1e51c4088e17de1847fe1c0c7db7c5766ba92d55f50910538f3e9665f42be6c
234 Risk Score

Malware Insights

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

The PDF file contains a link farm and a specific malicious redirector URL disguised as a document about catfish farming. The primary malicious URL is https://ttraff.cc/pify?keyword=feasibility+study+on+catfish+farming+in+nigeria+pdf, which likely leads to further malicious content. The document body, though heavily obfuscated, contains references to the document title and the malicious URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=feasibility+study+on+catfish+farming+in+nigeria+pdf In PDF document text
    • http://jugavox.beadsbraidsknots.co.uk/uploads/1/3/1/4/131409090/womagufoge-ketetenubumor-rojimogip-towivo.pdfIn PDF document text
    • http://files.ebikeco.com/uploads/1/3/1/6/131607075/466379.pdfIn PDF document text
    • http://files.patriciasplacecatholicgiftshop.com/uploads/1/3/2/6/132695321/lanunefebazol.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/1/0431/6659/7288/files/90723084391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2270/4030/files/62589601635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6460/7398/files/cd_action_1999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0279/0039/files/gudonuliz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0686/8126/files/teoria_del_liberalismo_economico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/64300390429.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4638/8380/files/67585701398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/46457747182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8312/8214/files/29497107134.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/34650792561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/8773416687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0896/6312/files/tasaxiromakumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6762/2055/files/44872097886.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4A 5764 bytes
SHA-256: a47282ae695d8bba237f87201aa7ef198697353ba96e609b72d7455632337c1b
font_01_sfnt_off00007ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECC 10444 bytes
SHA-256: 6ec8451e5aae77058e5b254e5ada1215c26a76b58e8d4dc10f29303310e9c67b