Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af08ebe3bb7a002…

MALICIOUS

PDF

42.4 KB Created: 2020-08-30 13:25:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da0dfeca9261b36bada189cbd80e76f3 SHA-1: dcc751cac97f0358e84e3b312ecb933693c1b74c SHA-256: 7af08ebe3bb7a00204943daa5fd01759f5dee243789accb1320f2d214b5e2b67
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, also contains the URL for the redirector. The presence of numerous other links to Shopify, likely part of a link farm, further supports a malicious intent to distribute or redirect traffic. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.ru/wix?keyword=areas+funcionales+de+la+administracion
    • https://cdn.shopify.com/s/files/1/0434/6390/1348/files/free_easter_math_worksheets_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0438/5724/8421/files/deputovavodadotukekarakav.pdf
    • https://cdn.shopify.com/s/files/1/0431/7616/5536/files/tamasha_online_movie.pdf
    • https://cdn.shopify.com/s/files/1/0436/2646/3385/files/valupikap.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/pdf_to_word_download_filehippo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2919/1066/files/architecture_web_design_templates.pdf
    • https://cdn.shopify.com/s/files/1/0435/1528/1568/files/schroeder_thermal_physics_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0437/6847/9893/files/79597013926.pdf
    • https://cdn.shopify.com/s/files/1/0438/2294/0320/files/21733833965.pdf
    • https://cdn.shopify.com/s/files/1/0447/9975/4397/files/plywood_workbench_plans.pdf
    • https://cdn.shopify.com/s/files/1/0434/2022/1607/files/47513672668.pdf
    • https://cdn.shopify.com/s/files/1/0428/1335/8247/files/lista_de_alimentos_ricos_em_proteinas.pdf
    • https://cdn.shopify.com/s/files/1/0448/5152/7842/files/league_of_legends_6._9_patch_notes.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/nujevewuvip.pdf
    • https://cdn.shopify.com/s/files/1/0430/9811/2167/files/tetutopasinibemo.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_off000065aa.bin
55d333a3d5b901ba832dccd862c18b2fabfa85d3ee8b4ea9ad2ce767ffacd4b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x65AA 5156 bytes
font_01_sfnt_off00007711.bin
7dfd6b588f594f5500a8b6e4f0d2d32966d8d4cb99b3a862db4cdf7d7579ab00
pdf-font-stream PDF embedded font (sfnt) at offset 0x7711 10896 bytes