Malicious PDF — malware analysis report

Static analysis result for SHA-256 041eb415b5f9f114…

MALICIOUS

PDF

44.7 KB Created: 2020-08-15 08:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84b3b2850fc6846099751427d0983f01 SHA-1: b332c8dd82e000b9ef8137591ed1610348f7de4b SHA-256: 041eb415b5f9f114efd98e8b17186e07e34a877e39cb8c56f0e79697a4ad1c83
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with one critical heuristic identifying it as a malicious redirector. The primary malicious URL, https://ttraff.cc/wb?keyword=polisemia%20homonimia%20ejercicios%20pdf, is likely used to redirect users to further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/wb?keyword=polisemia%20homonimia%20ejercicios%20pdf
    • http://files.imperialcoinsinv.co.uk/uploads/1/3/1/8/131856129/kixuton-ginilapanidadip.pdf
    • http://files.popswoodencreations.com/uploads/1/3/1/3/131398235/36c748682b45.pdf
    • http://files.drderickclinic.com/uploads/1/3/1/4/131406173/nidosuguro-tovakamaxije-niwekukaf-rekap.pdf
    • http://bixedav.creammedia.co.uk/uploads/1/3/0/9/130969873/kujexelivajorubovope.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/43669331649.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/google_form_responses_to_multiple_emails.pdf
    • https://cdn.shopify.com/s/files/1/0437/8548/6485/files/wotetudibosivumosoxawomu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/risuxizajirufarumaxefo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94323725826.pdf
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/59094624257.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/57835996233.pdf
    • https://cdn.shopify.com/s/files/1/0431/2478/5319/files/lagadekalukafazimelij.pdf
    • https://cdn.shopify.com/s/files/1/0437/8502/7745/files/chrysler_300_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3825/files/cen_tech_digital_multimeter_p37772_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7002/1014/files/62335857934.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/blank_avery_5195_label_template.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ca5.bin
00f2e580b2af15fe92b05d3d31d29730710f9d13a55893b708bf33d13028954a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA5 5472 bytes
font_01_sfnt_off00007f1d.bin
d4fbb32d3f838655b9e7dcbd085eb3a02bc4453e71780dfbed94d81de625c2d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1D 11588 bytes

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