Malicious PDF — malware analysis report

Static analysis result for SHA-256 887b5ffb2d379a80…

MALICIOUS

PDF

47.5 KB Created: 2020-08-14 22:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d7b531287f74c7f6100eb98771057a5e SHA-1: b9c319d3d40c1dd8e269d68dddc88da2e9011c09 SHA-256: 887b5ffb2d379a80736fce42208b92dba9c69409fcd3ddb9c827c99b655c2d86
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a malicious domain, identified as a redirector. The document body, though heavily obfuscated, contains text related to 'house construction agreement format in tamil' and a URL that appears to be part of a link farm designed to attract traffic. The ML classifier strongly indicates maliciousness, and the PDF structure includes numerous external links, many hosted on Shopify, suggesting an attempt to disguise malicious content within a seemingly legitimate document.

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=house+construction+agreement+format+in+tamil In PDF document text
    • http://files.aquaterrespa.com/uploads/1/3/1/3/131397946/c683b5f76ebfa.pdfIn PDF document text
    • http://files.cisenoughisenough.org/uploads/1/3/2/6/132681884/koxumamafedazi.pdfIn PDF document text
    • http://files.larte.us/uploads/1/3/1/3/131380288/c33f435fd73d27.pdfIn PDF document text
    • http://nugazo.myconcordpharmacy.com/uploads/1/3/1/4/131453133/xaniw.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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/1/0434/3349/2641/files/35631612778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/detailed_lesson_plan_in_filipino_grade_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9377/7827/files/california_dmv_real_id_application_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0854/0324/files/ate_ve_su_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/phonics_worksheets_for_kindergarten.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4877/9426/files/dusogudavekokofixipubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6671/0433/files/kufawebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/nunizilotinot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5585/7315/files/85562301625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7405/1491/files/the_prince.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5597/0454/files/wudikekosepogimejipa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00007038.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7038 13088 bytes
SHA-256: 1341f703209d828e2635ce2a39932f8ebb0711cc9b5ee52608b21ab0487f993d
font_00_sfnt_off00005ec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC8 5164 bytes
SHA-256: 719bb78aa2e71a543fc39d963cb75123bd0f18a237e7aafe840981324a3444df
font_02_sfnt_off00008f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F9E 9776 bytes
SHA-256: 0b12baf5fc139f15f05ddbbfa36156a8aa57ac0269a7627a342cb438f585cd6e