Malicious PDF — malware analysis report

Static analysis result for SHA-256 93882fa75deaab64…

MALICIOUS

PDF

60.7 KB Created: 2020-07-31 15:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c8c88c9971d8e3afa7f02b867c47105 SHA-1: 0f24c6d69450cbd3f5ad793c11bfa3380931df33 SHA-256: 93882fa75deaab64fa6b28601a1458569f5ea8325c44923f13af11248390a718
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a notable concentration pointing to Shopify-hosted files, suggesting a link farm or SEO manipulation tactic. One of these URLs, 'https://ttraff.cc/pify?keyword=caret+shaped+letter', is identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirection attack pattern.

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=caret+shaped+letter
    • http://files.geekyteas.com/uploads/1/3/0/8/130814208/xazusogitizi.pdf
    • http://files.lifepointeroanoke.com/uploads/1/3/1/8/131871864/e8043.pdf
    • http://files.karolinafreino.com/uploads/1/3/1/4/131438077/4171774.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9766/files/87961307117.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6358/files/45692963597.pdf
    • https://cdn.shopify.com/s/files/1/0436/2053/2384/files/vujin.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/71386037324.pdf
    • https://cdn.shopify.com/s/files/1/0434/6127/9896/files/jilamemeluveruriliseti.pdf
    • https://cdn.shopify.com/s/files/1/0432/0837/6482/files/22247182310.pdf
    • https://cdn.shopify.com/s/files/1/0431/9923/4203/files/77956452892.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baludugosutagaxoreforodul.pdf
    • https://cdn.shopify.com/s/files/1/0433/8185/0268/files/tufojozopemilivufisulumos.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/68805915080.pdf
    • https://cdn.shopify.com/s/files/1/0429/4941/0979/files/59452893760.pdf
    • https://cdn.shopify.com/s/files/1/0432/6549/1106/files/maponunujat.pdf
    • https://cdn.shopify.com/s/files/1/0430/9401/6157/files/76747812098.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_off0000b1c6.bin
bace8f464142ce3685edfda83342862db72890e32621904167f935dea8f7b194
pdf-font-stream PDF embedded font (sfnt) at offset 0xB1C6 4596 bytes
font_01_sfnt_off0000c177.bin
d95196f378e5b209304a1902773e1dc3626e98d780855970a54e21d29002835b
pdf-font-stream PDF embedded font (sfnt) at offset 0xC177 10212 bytes