Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7905e2630da8b29…

MALICIOUS

PDF

68.0 KB Created: 2020-08-08 17:08:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc35b4f17b28cf594aa1a3eb34d220ed SHA-1: 3c8827e7620966eb1ffa3ebd5fa71baf8d5924fc SHA-256: b7905e2630da8b294a5c8b6883e78faecf7bb1a23c35550e9d2f671735d540ab
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body also contains this URL, suggesting the primary intent is to redirect users to malicious infrastructure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination. No scripts were extracted from this sample.

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/pify?keyword=resistencia+a+antibioticos+pdf+2020
    • http://files.dalessandroscouting.com/uploads/1/3/2/6/132682048/burogam-mamevigik-tiwis.pdf
    • http://files.youshouldvisitjapan.com/uploads/1/3/0/7/130738830/34d89585394176d.pdf
    • http://files.northpointcg.com/uploads/1/3/2/6/132682792/zubapofovogazim.pdf
    • http://files.fleacircusoz.com/uploads/1/3/1/0/131070452/mowomerevuvasigu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9809/6284/files/multilingualism_advantages.pdf
    • https://cdn.shopify.com/s/files/1/0433/8342/3128/files/dewokigelamizukufaraziteb.pdf
    • https://cdn.shopify.com/s/files/1/0448/4261/4945/files/odisha_news_paper_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9388/5089/files/autoria_y_participacion_derecho_penal_peruano.pdf
    • https://cdn.shopify.com/s/files/1/0435/4703/3752/files/rapofitote.pdf
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/kulem.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/impact_of_human_activities_on_environment.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7056/files/buvibufo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/80317034516.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nudukesobiji.pdf
    • https://cdn.shopify.com/s/files/1/0436/3796/4960/files/ziresox.pdf
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/wiposewime.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_off0000caca.bin
ff9d6e519ded24bce932e72c27a6a5b0872e71f1714c0f2cc99115645ee899f7
pdf-font-stream PDF embedded font (sfnt) at offset 0xCACA 5440 bytes
font_01_sfnt_off0000dd61.bin
ab9e4850cc10f87d4d0c2157e0887ea2ac1d9882dc4515ba08e70d79a54ab3ce
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD61 10856 bytes