Malicious PDF — malware analysis report

Static analysis result for SHA-256 df845b8eeefd098f…

MALICIOUS

PDF

52.6 KB Created: 2020-09-02 02:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e840c7b60add43ddef75f4067a1c6580 SHA-1: efbcf60c556f745b620e20c892879e932261f0ab SHA-256: df845b8eeefd098f62a3dc64fb4295c1177f60fe5999146920f54f080d8d49e3
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=arundhati+movie+songs+free++in+telugu'. This URL is embedded within the document body, suggesting a lure to trick users into visiting a malicious site. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of the malicious URL and the SEO link farm heuristic indicate a phishing or redirection attempt.

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.com/wix?keyword=arundhati+movie+songs+free++in+telugu
    • https://cdn.shopify.com/s/files/1/0434/8290/6789/files/osteoid_osteoma_carpal_bones_picture.pdf
    • https://cdn.shopify.com/s/files/1/0440/9845/3656/files/nefrologia_clinica_avendao_4ta_edicion_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0433/6825/1543/files/42357979015.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/how_to_open._ai_files.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fisebupujavilugux.pdf
    • https://cdn.shopify.com/s/files/1/0432/6640/8603/files/33519685836.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5678/files/arvore_genealogica_em_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0437/1061/1605/files/637144644.pdf
    • https://cdn.shopify.com/s/files/1/0434/2710/2887/files/wimawobatovawav.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/19142297993.pdf
    • https://cdn.shopify.com/s/files/1/0437/6304/0413/files/utorrent_movies_search_engine.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_off0000850b.bin
b6f5b5054d537723aa062b9e05c2a0b913efeb4db5a2c98cf811ab7114d78ec1
pdf-font-stream PDF embedded font (sfnt) at offset 0x850B 5372 bytes
font_01_sfnt_off0000972e.bin
a35c44355ff3612e07eeff135cdb7ff84c083e3604e51357b499d11b52a7b80a
pdf-font-stream PDF embedded font (sfnt) at offset 0x972E 15152 bytes