Malicious PDF — malware analysis report

Static analysis result for SHA-256 a75847290e0fce46…

MALICIOUS

PDF

46.9 KB Created: 2020-09-03 11:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00e60bde7eaadc12e2eca69b30f6e990 SHA-1: 982333479d8852b84653db28ed20a72c6191de39 SHA-256: a75847290e0fce46211e8fb264c3bd46f2809c2ab1932345d8153f5dc3b6b256
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a high number of embedded links to external PDFs, characteristic of a link farm. One of these links, https://ttraff.me/wix?keyword=durham+report+news, is identified as a known malicious redirector. The document body contains obfuscated text and the URL, suggesting a lure to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.me/wix?keyword=durham+report+news
    • https://cdn.shopify.com/s/files/1/0436/2692/2147/files/desk_calendar_2020_vector_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/6617/0271/files/43887372685.pdf
    • https://cdn.shopify.com/s/files/1/0437/6998/7223/files/introduction_au_bouddhisme.pdf
    • https://cdn.shopify.com/s/files/1/0432/4016/1435/files/crash_bandicoot_2_ps1_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/40532871312.pdf
    • https://cdn.shopify.com/s/files/1/0433/7857/3464/files/67130095315.pdf
    • https://cdn.shopify.com/s/files/1/0432/5349/8019/files/dietoterapia_cirrose_hepatica.pdf
    • https://cdn.shopify.com/s/files/1/0458/2866/9603/files/accelerator_plus_apk_full.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9398/files/39278048238.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/ginnie_mae_mortgage_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nemevisofopanufu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5494/6721/files/netflix_cookies_latest.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61086590007.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_off00007949.bin
18a2a3ed036342deac302002152fb9905b282ace9d32153faae44768a87763c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7949 5116 bytes
font_01_sfnt_off00008a9a.bin
96d94e0f2c4dd2e3f64a70e43dfe5330c3254e639209390f08c0af279d92495b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A9A 10684 bytes

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