Malicious PDF — malware analysis report

Static analysis result for SHA-256 6acc9e5a15ea55a2…

MALICIOUS

PDF

34.7 KB Created: 2020-08-25 18:25:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcc7a7aa0bd6fcc4d961cb63804266cb SHA-1: de530edc40f1ec2f3f79e777a7100c9e1eac1dd0 SHA-256: 6acc9e5a15ea55a2802d93377c2bc2d162cfa535d5706c4b525e5ecc9c57e2c2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify-hosted PDFs, designed to appear as a legitimate link farm. However, one critical link redirects to a known malicious domain, ttraff.com, indicating a phishing or redirection attempt. The ML classifier also strongly flagged this PDF as malicious.

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=principles+of+brewing+science+george
    • http://files.clareslearningclub.com/uploads/1/3/0/7/130775055/aeb0aa64f.pdf
    • http://lobadukax.arcticecology.ca/uploads/1/3/1/4/131483068/nozem.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0462/7903/2992/files/82875709739.pdf
    • https://cdn.shopify.com/s/files/1/0431/8131/0114/files/jejefezizakoboj.pdf
    • https://cdn.shopify.com/s/files/1/0436/2862/6080/files/sigedatijapas.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5032/files/xna_visual_studio_2017.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/free_online_photo_collage_maker_no.pdf
    • https://cdn.shopify.com/s/files/1/0433/9462/9788/files/4th_grade_math_practice_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/4459/9958/files/58501531371.pdf
    • https://cdn.shopify.com/s/files/1/0436/2141/7123/files/days_of_the_week_calendar.pdf
    • https://cdn.shopify.com/s/files/1/0449/4213/1355/files/spatial_analysis_modelling_in_a_gis_environment.pdf
    • https://cdn.shopify.com/s/files/1/0430/5872/5018/files/xijofe.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_off00004aa5.bin
2630913e0bb7e2cdd7b08e893b693c1985dce7ae9dabb3c98dd931806180ee6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x4AA5 5204 bytes
font_01_sfnt_off00005c78.bin
8b8b7c6c3c1905ea4392bd49b44a070a3367e74d4ff2622c20b12c38828d5af8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C78 9856 bytes