Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b0606aaf226153c…

MALICIOUS

PDF

58.1 KB Created: 2020-08-21 18:56:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a219c0ac210dcf828c81cc1a413d62d5 SHA-1: 49bbdef4b5da065f6980e0526f3e5209a7d417a3 SHA-256: 8b0606aaf226153c845dd901920438a32b7381e7bec4a6295a466bfc6773792e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a download for 'Brawl stars apk mod money'. The document also functions as a link farm, hosting numerous other PDF files on Shopify domains, likely to improve search engine ranking and obscure the malicious intent. The ML classifier strongly indicates maliciousness.

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.com/pify?keyword=brawl+stars+apk+mod+money
    • http://lupopi.upholsteringmelbourne.com.au/uploads/1/3/1/0/131070571/1889904.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/muwevepe.pdf
    • https://cdn.shopify.com/s/files/1/0437/7808/0925/files/dmv_practice_test_nj.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/algebra_questions_for_cat.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4042/files/voganovanulorafaget.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37144816260.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11147191401.pdf
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/91311585713.pdf
    • https://cdn.shopify.com/s/files/1/0431/6318/9405/files/factorio_balancer_blueprint.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0825/files/baduwevogilofagixi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3595/1257/files/netobinezowevonaviges.pdf
    • https://cdn.shopify.com/s/files/1/0445/3256/4132/files/basic_environmental_engineering_elementary_biology.pdf
    • https://cdn.shopify.com/s/files/1/0435/6043/5871/files/lozotu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/davipu.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000669b.bin
619a44e8b5c2a2d3fc0e18259d8022938ad4f8b30552901bc68dc41c3d0f2ef0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669B 2880 bytes
font_01_sfnt_off000070d9.bin
472b76e059d1a6f8df3688fea87a1b983b987e65da55e237cf401c4543cdac62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D9 5152 bytes
font_02_sfnt_off0000825a.bin
83b962c9724df07515e466640e7fea3d649a910669172684b2fcd70b30e49d5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x825A 9000 bytes
font_03_sfnt_off00009478.bin
2daf8e00e6347e84ad60ee5d1f7c80587ce8ddc1748ea35419745d6a35e4af1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9478 10128 bytes
font_04_sfnt_off0000b76a.bin
3f401360053e1b4d29c24019386b3079856d27c1a6fb1731fc2abffa1f8e552c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB76A 16136 bytes
font_05_sfnt_off0000cc6d.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6D 4324 bytes

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