Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e48ae58832333d6…

MALICIOUS

PDF

37.4 KB Created: 2020-08-25 16:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50b998b0e6c4c0c019eb5935e7cac72e SHA-1: da28835e71468ca456f6c5d5e710d60e277027e3 SHA-256: 6e48ae58832333d6f35a13618d03f7eb0b00889c4263cea4a55ca1f04e2292cc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body also contains this URL, along with a large number of other URLs, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to malicious sites via deceptive links.

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=career+opportunities+movie++sub+indo
    • http://files.giannibasaglia.com/uploads/1/3/2/7/132740852/8066184.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5448/1058/files/883032902.pdf
    • https://cdn.shopify.com/s/files/1/0429/0409/2839/files/jump_math_grade_3_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/8780/7129/files/xusewejizase.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/handbook_of_valves_and_actuators_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/2990/6079/files/pneumatic_sheet_metal_bending_machine_project_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/3060/9063/files/auld_lang_syne_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0446/6517/6217/files/interview_writing_format.pdf
    • https://cdn.shopify.com/s/files/1/0433/8145/7061/files/54438372212.pdf
    • https://cdn.shopify.com/s/files/1/0434/3817/8470/files/verizon_fios_channels.pdf
    • https://cdn.shopify.com/s/files/1/0439/2235/8427/files/83232713988.pdf
    • https://cdn.shopify.com/s/files/1/0429/2519/5427/files/traductor_ingles_archivos.pdf
    • https://cdn.shopify.com/s/files/1/0433/2093/4558/files/zigonewutegej.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_off00005101.bin
74d6135a89b7a6d5e7f1579392a4bfff97065536048be8412d910bbcd5ea51bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5101 5176 bytes
font_01_sfnt_off0000627b.bin
7b0cca3e03d3326a528b451bcca1891be8e0fe0009938432dba899f82fd0702e
pdf-font-stream PDF embedded font (sfnt) at offset 0x627B 11472 bytes