Malicious PDF — malware analysis report

Static analysis result for SHA-256 10b1640a1a9e8049…

MALICIOUS

PDF

46.7 KB Created: 2020-08-17 13:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e52d56ad3b601b866461e897c2b7b709 SHA-1: 776371f33c58480b57f23eaa2a99f25bb4cce452 SHA-256: 10b1640a1a9e80498717f25d5e7df1ada6125db9acab9de569b2bb7757945451
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=aplikasi+antrian+paspor+apk'. The document also exhibits characteristics of a PDF link farm, with numerous external links, many of which are hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves luring the user to click a link that leads to malicious infrastructure.

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=aplikasi+antrian+paspor+apk
    • http://pugovimi.nullarbortimberslabs.com/uploads/1/3/1/6/131606263/002362015.pdf
    • http://files.cbpencil.com/uploads/1/3/1/4/131438464/xobezuzozet_rodilesiludu.pdf
    • http://jefovo.stringtheorytennis.org/uploads/1/3/0/8/130813453/307042.pdf
    • http://files.triplejmoab.com/uploads/1/3/2/8/132815183/64915978.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/8415/9903/files/16934452622.pdf
    • https://cdn.shopify.com/s/files/1/0451/1947/1781/files/benchmarking_libro.pdf
    • https://cdn.shopify.com/s/files/1/0435/9729/9869/files/vanataketiretodiwi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7998/1470/files/digimon_world_dawn_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0436/4589/4816/files/xenajulufojaga.pdf
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/xekegebil.pdf
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/ctet_answer_key_december_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3967/7855/files/nirvana_unplugged_torrents.pdf
    • https://cdn.shopify.com/s/files/1/0433/2273/6798/files/30117509484.pdf
    • https://cdn.shopify.com/s/files/1/0437/5746/9845/files/mevezagenamope.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_off000079f9.bin
f2d102b5167dd27994c347b8844d6c00afbf09337d41c1c50c05cd58dffb7a61
pdf-font-stream PDF embedded font (sfnt) at offset 0x79F9 4868 bytes
font_01_sfnt_off00008a87.bin
a38989f7f791a1b4c4cea464a525737c0e4a17605ef18de664950bf32f027754
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A87 10416 bytes