Malicious PDF — malware analysis report

Static analysis result for SHA-256 d107add4bec4756b…

MALICIOUS

PDF

43.7 KB Created: 2020-08-13 00:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4a96b042cfdde4bd1ba8bf0939f057d9 SHA-1: 08a86724d2dd3f9b71a31fa8d70a6bf9cb3602b7 SHA-256: d107add4bec4756b741ff682e47d90f64f10b6f14c8424d1da932e7a9471944a
194 Risk Score

Malware Insights

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

The PDF document contains a link to a known malicious redirector, disguised as a user manual for a Whirlpool washing machine. The document also exhibits characteristics of a link farm, with numerous embedded links pointing to various PDF files, likely to improve search engine ranking and distribute malicious content. The primary malicious IOC is the redirector URL.

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/wb?keyword=whirlpool%20washing%20machine%20650d%20user%20manual In PDF document text
    • http://files.pinehurstmanorhoa.com/uploads/1/3/1/4/131406935/9390a51ba5.pdfIn PDF document text
    • http://lujod.commercialbondstexas.com/uploads/1/3/2/7/132740405/katonikubufifus.pdfIn PDF document text
    • http://zufuwu.maydwellarts.com/uploads/1/3/0/9/130969679/7353709.pdfIn PDF document text
    • http://files.evandusenportfolio.com/uploads/1/3/1/4/131454355/bf82dedefb0f4.pdfIn PDF document text
    • http://files.penelopijones.com/uploads/1/3/0/8/130813320/6f0ea31cf87af1.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/1/0436/8377/4614/files/sample_essay_for_ielts_writing_task_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/labupulozosoveguz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3077/2902/files/english_to_arabic_alphabet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4568/2328/files/38312027057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2596/4957/files/anti_corruption_commission_zambia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2871/6440/files/asignatura_estatal_primero_de_secundaria_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexidemunuviviradepinitim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9743/8875/files/ganovaruzivoxite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3986/4485/files/29294731186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/9714456865.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5808/6559/files/2090627121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9573/6988/files/pawalesafuworesevasabi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C28 6012 bytes
SHA-256: 94103c4f88d2a11b092330bfb838d136251b3ec208bfa5f69558d352e500797b
font_01_sfnt_off00006080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6080 13696 bytes
SHA-256: 040c9eed6799c187925e9f8e041745fece798d3b6c4d3ffc1db3ce7253feea5b
font_02_sfnt_off00008c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C23 16164 bytes
SHA-256: 0d7a92828fb34c46272def7401d297891c72c028a4bdfa4d2814ce18bde6b281