Malicious PDF — malware analysis report

Static analysis result for SHA-256 88641a5a60bf7a63…

MALICIOUS

PDF

34.7 KB Created: 2020-08-14 01:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a84928be3a3098e30bd416366c54cb9 SHA-1: 58369e9a55339520410d8be9b47ccdff69d0ced6 SHA-256: 88641a5a60bf7a631dbc4688a72699ade7353c8f5fee17af6c21c97610d3ca3e
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, including a critical link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=aimware+csgo+hack+free'. This redirector is likely used to funnel victims to malicious websites or download further malware. The document body, though heavily obfuscated, contains text related to 'aimware csgo hack free', reinforcing the lure. The presence of numerous PDF links, many hosted on Shopify, suggests a link farm designed to improve SEO for malicious content.

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=aimware+csgo+hack+free
    • http://files.cocoamoy.co.uk/uploads/1/3/0/9/130969048/4511609.pdf
    • http://files.hopelutheranwarren.com/uploads/1/3/1/4/131453086/lepalixopabew.pdf
    • http://nixijumi.franklywithfaith.com/uploads/1/3/0/8/130814855/a66f4543a8da.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/33147310182.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74195332560.pdf
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/31077587610.pdf
    • https://cdn.shopify.com/s/files/1/0436/8728/0790/files/gazetajidomabanogujet.pdf
    • https://cdn.shopify.com/s/files/1/0434/1704/3111/files/84885415625.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/tusigulanugolusegebi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4628/files/corpus_juris_secundum_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/9416/3109/files/rokabanosibakamig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/totavari.pdf
    • https://cdn.shopify.com/s/files/1/0432/3174/0066/files/53955076250.pdf
    • https://cdn.shopify.com/s/files/1/0438/4079/8885/files/concepto_de_contaminacion_ambiental.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4344/files/63839827536.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/23425424772.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_off0000497e.bin
97019c369e2c8e2b0b65389158bb058a98609e98ef86dc8146027ce1df0b5f24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x497E 5408 bytes
font_01_sfnt_off00005bca.bin
dd189ad7a6afff1e88ff131a40b12ef54cb4dfcbc111ede7b7185fc14470df1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCA 10076 bytes

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