Malicious PDF — malware analysis report

Static analysis result for SHA-256 3956bd03bde1e23e…

MALICIOUS

PDF

45.0 KB Created: 2020-08-14 12:01:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46f22e67057781533f590dc84387560d SHA-1: 4f3f890427e0529820cc0e7a6280096526ce8108 SHA-256: 3956bd03bde1e23e7d8ca73b48a3f783d72aff87f3791c8c7256e146c3f24c8e
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=anemias+classifica%25C3%25A7%25C3%25A3o+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF links hosted on domains like cdn.shopify.com, suggesting a coordinated effort to drive traffic to potentially harmful sites. No scripts were extracted from this sample.

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.ru/pify?keyword=anemias+classifica%25C3%25A7%25C3%25A3o+pdf
    • http://rijifug.tkdsomerset.com/uploads/1/3/2/3/132302978/6688053.pdf
    • http://zibolegu.complete-instructor-training.co.uk/uploads/1/3/2/6/132696414/sizalidoki.pdf
    • http://files.redsamuraiconsulting.com/uploads/1/3/0/9/130969322/1215170.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mirogorozizodixomalejog.pdf
    • https://cdn.shopify.com/s/files/1/0432/2738/1920/files/juworidejatev.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/reddit_scooby_doo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2993/8855/files/vokubiruvugidoseginekosov.pdf
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/1043369163.pdf
    • https://cdn.shopify.com/s/files/1/0429/3804/0487/files/contabilidad_asientos_contables_ejercicios_resueltos.pdf
    • https://cdn.shopify.com/s/files/1/0429/2080/4511/files/analytical_chemistry_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/7190/5698/files/basic_engineering_drawing_for_first_year_diploma.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4241/files/braid_walk_through.pdf
    • https://cdn.shopify.com/s/files/1/0449/4236/0744/files/amazing_spider_man_2_apk_free.pdf
    • https://cdn.shopify.com/s/files/1/0448/9006/3003/files/all_html_color_codes.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_off00006b1f.bin
fd28fd5bfbaae10cb6465dd0737acfc436100e48465ef54342d9e5794a6671db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1F 5696 bytes
font_01_sfnt_off00007d84.bin
05db256ed8472bd452bf5ec9632369a9e603b5c639428b5b91102126d8330fa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D84 13732 bytes

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