Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ec54abd935dfcb…

MALICIOUS

PDF

63.0 KB Created: 2020-08-19 04:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b194984e8be70d8c9d5475f7df01341 SHA-1: 6de0b9734b9e15e86d0f998a92c9ea93d73d43c8 SHA-256: 64ec54abd935dfcbf0733ccff705580f596adc196d95a8cba22490f652261e8a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to distribute malicious content. The ML classifier also strongly indicated maliciousness.

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=combining+like+terms+notes+answer+key
    • http://vesikigav.marilynfraserart.com/uploads/1/3/0/7/130739688/6245191.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/87138016980.pdf
    • https://cdn.shopify.com/s/files/1/0431/0764/7639/files/2019_movies_in_tamilrockers._net.pdf
    • https://cdn.shopify.com/s/files/1/0439/6112/2974/files/pdf_sociologie_du_dveloppement.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuzodatusowajukekef.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/xosibigufatavojeluxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1161/2572/files/11444815019.pdf
    • https://cdn.shopify.com/s/files/1/0434/0596/7527/files/niwazopupularuparizag.pdf
    • https://cdn.shopify.com/s/files/1/0435/0777/7702/files/muse_twilight_songs.pdf
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/soludu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1107/9317/files/24409361505.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aeea.bin
a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8
pdf-font-stream PDF embedded font (sfnt) at offset 0xAEEA 2828 bytes
font_01_sfnt_off0000b8e4.bin
b7bffb3f7fb8a4353d6b4495a8ed9b48a13c0bbbb4330fdda48762e4cd0181ec
pdf-font-stream PDF embedded font (sfnt) at offset 0xB8E4 5308 bytes
font_02_sfnt_off0000caf0.bin
cd80fd62ba304f5aa05f0e8f55d784c9efa0cf70d16b0026b866149d2919a21d
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF0 9868 bytes