Malicious PDF — malware analysis report

Static analysis result for SHA-256 19964f45bbb349db…

MALICIOUS

PDF

34.5 KB Created: 2020-08-10 19:36:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 783d5d48562a1705a76c6ad220684ab5 SHA-1: f12649f0d9b2c148f40058c75406e9c5de6f48ef SHA-256: 19964f45bbb349db358990f0fd3530c5306a84c698bbff385dae2af577a9e3cb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by an ML classifier and contains a large number of embedded links. One of these links, 'https://ttraff.com/pify?keyword=agito+cosmos+pdf', points to known malicious redirector infrastructure. The document body also contains this URL and numerous other Shopify links, suggesting a link farm or phishing attempt designed to lead users to malicious sites.

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=agito+cosmos+pdf
    • http://files.bluesensation.org/uploads/1/3/2/8/132815767/2340909.pdf
    • http://files.getfitwithida.com/uploads/1/3/1/3/131383651/ddea7a3.pdf
    • http://pitikulo.shoplocaldealsnc.com/uploads/1/3/0/9/130969352/voxitipipevabeto.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/1471/5549/files/sc_caste_list_in_karnataka.pdf
    • https://cdn.shopify.com/s/files/1/0437/0753/1432/files/dedelegapi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/heymann_control_of_communicable_diseases_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/1219/3447/files/16248083442.pdf
    • https://cdn.shopify.com/s/files/1/0437/0841/6165/files/dark_knight_skill_build.pdf
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/felebugijubaxekekodizowew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5561128363.pdf
    • https://cdn.shopify.com/s/files/1/0434/8549/5453/files/49209234208.pdf
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/xebesazufidadu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4492/8674/files/tinotebigevixavifumuke.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/90691323997.pdf
    • https://cdn.shopify.com/s/files/1/0440/5601/9109/files/xejiberutulefeludezaxug.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/kujekukizanarojade.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_off00004a44.bin
17f1503ea54b211d0a804e0df1b7b16884eee7be2c9467b6ce5feb9e4f4be04a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A44 5124 bytes
font_01_sfnt_off00005bb0.bin
17130daad34fce503f6f47e113bb9d02ec55aee48ee562588bdfdb8e5038e650
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB0 9888 bytes