Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2f026f549c11767…

MALICIOUS

PDF

50.3 KB Created: 2020-08-30 23:33:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27f7fe1e378297cbacb3cd7005018033 SHA-1: c80ed28e8f0a7e6fcc114af0511213de498fef7f SHA-256: a2f026f549c11767bffbb4dd6956c15d40cd0d8e97b9af78c40f46ad45575801
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'pickup artists' and includes the same malicious URL. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a malicious link embedded within the PDF.

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/wix?keyword=the+game+penetrating+the+secret+society+of+pickup+artists
    • https://cdn.shopify.com/s/files/1/0434/6868/5464/files/51354378243.pdf
    • https://cdn.shopify.com/s/files/1/0431/2524/4053/files/87692765658.pdf
    • https://cdn.shopify.com/s/files/1/0432/3016/7202/files/dunaxopixelebofeko.pdf
    • https://static.usrfiles.com/ugd/b8c837_83408f72035d4856865fce5046171f54.pdf
    • https://static.usrfiles.com/ugd/930050_37981f332d5749efaac7a8574eaa7c39.pdf
    • https://static.usrfiles.com/ugd/8b97dd_5c8959efd9c44fc9beebef3f5e234247.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ecdb13adb7c4b1888c2f9531758d173.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7cad19561784757bac6159ac009e1cd.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/aprendizaje_basado_en_la_resolucion_de_problemas.pdf
    • https://cdn.shopify.com/s/files/1/0436/7374/7609/files/lizexilo.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_off000084f8.bin
ca9dcc1844786d6ac0d678fa763dae041b956a5e7075430fb58a40a43f9d0c02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84F8 5512 bytes
font_01_sfnt_off000097a2.bin
85b3787fe87af4dbd3f14d16f7fe1569eb6d598c7acb329296a5002d3526cc8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97A2 10684 bytes

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