Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccce47caf8c3804d…

MALICIOUS

PDF

36.5 KB Created: 2020-08-01 23:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca310411035ca86ae4862bff70c1ccb5 SHA-1: f0f1e8b875aace4e2457a5ae0a99aa9f271ca0f1 SHA-256: ccce47caf8c3804de9be28d21ebab8bd7c18a91667e7c65135a307a6484d7b16
154 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous embedded URLs, including a critical redirector link to 'ttraff.ru'. This indicates a likely attempt to lure users to malicious sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a link farm and redirector is sufficient evidence of malicious intent.

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.ru/pify?keyword=subnautica+table+coral
    • http://files.scsoutherncrossfarm.com/uploads/1/3/0/7/130775267/30530a1ebd.pdf
    • http://files.ponderosaguild.org/uploads/1/3/1/6/131636728/3267965.pdf
    • http://files.luciebaker.com/uploads/1/3/0/7/130739860/kuletibuxedukas-baguzibujat-bemukezenulo-sobawu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6859/7158/files/21667381981.pdf
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/nigamubomabovugal.pdf
    • https://cdn.shopify.com/s/files/1/0429/2955/3575/files/13444975547.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/52827744019.pdf
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/xikujeva.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0064/files/xawedazagebomuzolib.pdf
    • https://cdn.shopify.com/s/files/1/0433/8227/6257/files/4682170097.pdf
    • https://cdn.shopify.com/s/files/1/0433/0576/2974/files/51541615903.pdf
    • https://cdn.shopify.com/s/files/1/0429/2493/3287/files/74449412828.pdf
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/81167121.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/lovuvusisok.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_off00005344.bin
79735ceadefcfffab1cbb3d4ff64ffe0e2fd428e5115943444744f4b2640fa80
pdf-font-stream PDF embedded font (sfnt) at offset 0x5344 4856 bytes
font_01_sfnt_off000063d5.bin
af7b40223583d6a8ed12bc7a12e38a86ec4f4d884054cb370f3f9ea6960e9e81
pdf-font-stream PDF embedded font (sfnt) at offset 0x63D5 9740 bytes