Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c24a1690b741e2f…

MALICIOUS

PDF

47.5 KB Created: 2020-08-21 15:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22503166da43b9ca0af53681be0fc707 SHA-1: f18d95cdd37c7e8b4e0867ed7c132c153dfadf12 SHA-256: 2c24a1690b741e2f0162a35ef1f2a9f8757c88e44b665b0efce69a75d935221d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a deceptive title and numerous embedded links, including one pointing to a known malicious redirector. The primary malicious link is 'https://ttraff.cc/pify?keyword=guidelines+for+effective+speaking+skills', which likely leads to further malicious content. The document's structure and the presence of many external PDF links suggest a link farm or redirection tactic to distribute malware or phishing content.

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/pify?keyword=guidelines+for+effective+speaking+skills
    • http://nagevak.tngsblog.org/uploads/1/3/0/7/130775413/tanaf.pdf
    • http://tetoriwap.goto2025.com/uploads/1/3/1/3/131383775/sobiwumujipatoba.pdf
    • http://files.ksexoticfragrances.com/uploads/1/3/0/8/130873922/20feb9.pdf
    • http://files.stator-creative.com/uploads/1/3/2/6/132696465/8e2f2f5e.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/grimm_wiki_episode_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/1703/5166/files/nibebisesasidiroj.pdf
    • https://cdn.shopify.com/s/files/1/0432/3105/1931/files/77455039559.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/79283998670.pdf
    • https://cdn.shopify.com/s/files/1/0429/0668/1497/files/quality_control_interview_questions_and_answers_in_pharma.pdf
    • https://cdn.shopify.com/s/files/1/0437/9662/7618/files/hadia_sher_ali.pdf
    • https://cdn.shopify.com/s/files/1/0433/4524/8407/files/arteritis_temporal_de_celulas_gigantes.pdf
    • https://cdn.shopify.com/s/files/1/0428/8633/2575/files/22247067952.pdf
    • https://cdn.shopify.com/s/files/1/0437/5396/3678/files/power_smokeless_grill_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/36559701169.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/92175340945.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ade.bin
2dbcca84ca3582e07ea361931c9427113719d49f4c738997ada42187197ceb8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADE 5476 bytes
font_01_sfnt_off00008d93.bin
92729bc33f2de6312cf3556f928fd98ef44d1af418236458605ae3aac2a466b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D93 10436 bytes