Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d27b1fa3c558f4d…

MALICIOUS

PDF

41.4 KB Created: 2020-08-10 15:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: faded266cff58bbf52095b6eb0d233eb SHA-1: 7cd9d17a2dfc0489466f502cf6b49cc3ddb359f8 SHA-256: 4d27b1fa3c558f4d9a952650a73b594073fe1ff71f547449ca74f5f63c15a5ba
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with many pointing to a link farm hosted on cdn.shopify.com. One of these links, 'https://ttraff.cc/pify?keyword=kundalini+yoga+routine+pdf', redirects to known malicious infrastructure. This suggests a social engineering attack aimed at directing users to malicious content or phishing sites through a deceptive link farm.

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.cc/pify?keyword=kundalini+yoga+routine+pdf
    • http://lukagik.compassionsfireministriesinternational.org/uploads/1/3/1/4/131406749/novebutidavazidi.pdf
    • http://polamanen.losalcouncil.com/uploads/1/3/2/3/132303382/mepavuv.pdf
    • http://bijamagox.iskconlasvegas.com/uploads/1/3/0/7/130776078/2886595.pdf
    • https://cdn.shopify.com/s/files/1/0432/2269/6098/files/81142978579.pdf
    • https://cdn.shopify.com/s/files/1/0433/6104/2591/files/48162488995.pdf
    • https://cdn.shopify.com/s/files/1/0432/2040/2337/files/writing_algebraic_equations_from_word_problems_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/2060/7900/files/46456982157.pdf
    • https://cdn.shopify.com/s/files/1/0440/6539/0757/files/65378204548.pdf
    • https://cdn.shopify.com/s/files/1/0437/8542/0949/files/facebook_brute_force_python_script.pdf
    • https://cdn.shopify.com/s/files/1/0427/8566/9279/files/bedhead_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/1561/8203/files/renojisemamuka.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/brawler_s_guild_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/40_day_love_dare_for_parents.pdf
    • https://cdn.shopify.com/s/files/1/0429/9787/4851/files/chief_keef_colors_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/alta_fidelidade_download_gratis.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_off0000667f.bin
8a1a12fc0be928223d5752cd26dfda53fc6cf92a889ef3468d675ef2e3df5f74
pdf-font-stream PDF embedded font (sfnt) at offset 0x667F 5104 bytes
font_01_sfnt_off000077fa.bin
0e336dc087798dcba8905b4ebf002a40082107edba16e64f27c495a9783a2b23
pdf-font-stream PDF embedded font (sfnt) at offset 0x77FA 9680 bytes