Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad64528e7c51a194…

MALICIOUS

PDF

58.3 KB Created: 2020-08-21 22:19:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d90a78c71fa0bb37bcc18a490950aa0 SHA-1: 49b5baf2dd5d6840ad9f6487f9ddfa83ad28ffab SHA-256: ad64528e7c51a1942c293e96d363034455f32b71e55147a80c157a81c0798870
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, ttraff.com, disguised as a TV show episode guide. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the URL and a keyword suggesting a lure. The presence of numerous external PDF links, many hosted on cdn.shopify.com, indicates a link farm strategy to distribute the malicious payload.

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=dynasty+tv+show+episode+guide
    • http://files.thesupershowdown.com/uploads/1/3/0/9/130969761/jimov.pdf
    • http://vuzil.russmillssigns.com/uploads/1/3/1/3/131379730/tolezitezewutuno.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/juwegire.pdf
    • https://cdn.shopify.com/s/files/1/0432/8944/4510/files/36500305520.pdf
    • https://cdn.shopify.com/s/files/1/0427/9966/1223/files/gawizupumisuzidu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8460/1758/files/76951501851.pdf
    • https://cdn.shopify.com/s/files/1/0428/8105/6931/files/xarinagufof.pdf
    • https://cdn.shopify.com/s/files/1/0432/0277/3156/files/92242420099.pdf
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/watino.pdf
    • https://cdn.shopify.com/s/files/1/0431/0453/4692/files/loved.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37263727017.pdf
    • https://cdn.shopify.com/s/files/1/0429/2716/1507/files/gatisowaraxetiravapovo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49470024852.pdf
    • https://cdn.shopify.com/s/files/1/0430/2084/5210/files/bionicle_heroes_full_version_pl.pdf
    • https://cdn.shopify.com/s/files/1/0432/2200/7965/files/fundamentals_of_musical_acoustics_benade.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_off0000a6fe.bin
4fd99bee947f559b0f31fbc46ee60805ee7314bf0f2ba29afdb3b73606525b4d
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6FE 5344 bytes
font_01_sfnt_off0000b94e.bin
d2bf86d09962758d0e1ef354cc2bff83750308b5c65d2a9db05b00a4af314a69
pdf-font-stream PDF embedded font (sfnt) at offset 0xB94E 10192 bytes