Malicious PDF — malware analysis report

Static analysis result for SHA-256 481e00a394445780…

MALICIOUS

PDF

40.7 KB Created: 2020-08-25 02:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e18a6512adfd1f9fedac207c282ff9a1 SHA-1: b68288161aef2b4c302199d7e041f2e613557b2e SHA-256: 481e00a3944457808d3d228efc6350298062f407cd4cfef72f19f9f087b02eb1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by an ML classifier and contains a large number of external links, many pointing to Shopify-hosted PDFs. One of these links, 'https://ttraff.com/pify?keyword=bellarine+uniforms+kardinia', is identified as a malicious redirector. This suggests the document is part of a link farm designed to lure users to malicious content, likely for phishing or a scam.

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=bellarine+uniforms+kardinia
    • http://files.horseshoecrabtagging.org/uploads/1/3/1/3/131380295/rukojurunusila.pdf
    • https://cdn.shopify.com/s/files/1/0430/1357/0709/files/34717259594.pdf
    • https://cdn.shopify.com/s/files/1/0431/2390/0565/files/connecticut_driver_s_permit_test_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0441/2017/8840/files/diagram_designer_ppt_templates.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3464/files/46838395570.pdf
    • https://cdn.shopify.com/s/files/1/0432/9963/5355/files/631131585.pdf
    • https://cdn.shopify.com/s/files/1/0437/1942/6197/files/starbound_failed_to_read_full_buffer.pdf
    • https://cdn.shopify.com/s/files/1/0434/4840/2081/files/polarity_test_of_current_transformer.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/86914338026.pdf
    • https://cdn.shopify.com/s/files/1/0440/7905/5000/files/nfl_week_15_bettor_s_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/2041/1289/files/john_deere_sabre_1438_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/7253/4168/files/carcinoma_basocelular_tipos.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053a3.bin
c0f07209e47ce76e72d20728091636c2fc2001f49ab8a6feda4eba51324719e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x53A3 4968 bytes
font_01_sfnt_off00006464.bin
feb039779e99e5608a043d00357d0bcca9d56bcb4208966dc3aabbd884cd4c20
pdf-font-stream PDF embedded font (sfnt) at offset 0x6464 10468 bytes
font_02_sfnt_off00008831.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x8831 4324 bytes