Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d2d2cecf539b9c1…

MALICIOUS

PDF

48.8 KB Created: 2020-08-27 18:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d872e38bc847cd1158e889facede2c00 SHA-1: 60e270bb7913c85de48d1be1d750d1a704d049b4 SHA-256: 7d2d2cecf539b9c1d8c3c76e157d18b40dded49e7448b30366d5b8688006f2c2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lure users to malicious sites. The document body, though heavily obfuscated, contains the same redirector URL. The presence of a link farm heuristic further suggests malicious intent to distribute malicious 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.cc/pify?keyword=aristotelian+concept+of+tragic+hero+pdf
    • http://files.drtaylormathcoach.com/uploads/1/3/0/7/130740213/tikuwirixem.pdf
    • http://setagoto.frederickpediatrics.com/uploads/1/3/0/8/130874566/dafizigetituwuza.pdf
    • http://lavutasaz.seaintheskyhealing.com/uploads/1/3/1/3/131380213/4685f232f.pdf
    • https://cdn.shopify.com/s/files/1/0437/2656/9633/files/mahalaxmi_calendar_april_2019_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/3070/6333/files/faguteg.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/405782122.pdf
    • https://cdn.shopify.com/s/files/1/0430/7212/7125/files/biometria_hematica_perros.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doxufuvezemog.pdf
    • https://cdn.shopify.com/s/files/1/0430/3981/7890/files/check_if_worksheet_exists_excel_vba.pdf
    • https://cdn.shopify.com/s/files/1/0435/2521/0263/files/calendario_2020_para_imprimir_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0437/7346/0631/files/autosys_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0427/9851/4343/files/81271908204.pdf
    • https://cdn.shopify.com/s/files/1/0437/1339/6901/files/tekken_7_tier_list_season_3.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_off00008303.bin
de8fb152b1ef84663cb94aca362f51884dc079676fc48ffbf718ad0bf107aae1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8303 5408 bytes
font_01_sfnt_off00009554.bin
34b1564a134ae79d03ae6d85cd9787cb513ae4d38776d7d1d434b344dbe46cd7
pdf-font-stream PDF embedded font (sfnt) at offset 0x9554 9660 bytes