Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2c21295cdb5fc6c…

MALICIOUS

PDF

42.9 KB Created: 2020-08-29 06:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adbf040cb71196c9376b1d0d6bd39f16 SHA-1: 72ed5f2b937528ebd6917a575e5e595fe512c022 SHA-256: b2c21295cdb5fc6c89506376b5490948f46e58f2d5b22ecbefd1ccfa7e2b0691
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=pdfgrabber+7.0+license+key'. Additionally, it exhibits a low-signal heuristic for a visual download button lure, suggesting a social engineering attempt. The document body, though partially corrupted, contains references to the malicious URL and other URLs hosted on Shopify, likely part of a link farm to improve search engine ranking for malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=pdfgrabber+7.0+license+key
    • https://cdn.shopify.com/s/files/1/0429/3948/2275/files/38705532719.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/michigan_steelhead_fishing_report_manistee_river.pdf
    • https://cdn.shopify.com/s/files/1/0460/0142/2497/files/tojukovanasigajo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8741/9806/files/27929375589.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8268/files/guia_de_los_movimientos_de_musculaci.pdf
    • https://static.usrfiles.com/ugd/b8c837_76d0cdb03cbe4eefb51f5c5877cff0e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3412b6fb3b5451aa6a36a134e74a7df.pdf
    • https://static.usrfiles.com/ugd/b8c837_579b2d69560a44cb9ac5659624830d5e.pdf
    • https://static.usrfiles.com/ugd/b8c837_36fb915e0096447898b6b4d3571db319.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/bodowexolatapevumo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8098/1403/files/27831253463.pdf
    • https://cdn.shopify.com/s/files/1/0436/0136/3107/files/27792719413.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6273/files/30412365519.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000523d.bin
19fd6ec01fa73eed63d59d7dd78599692016cd3323577ab79e2f5689a0ab6da8
pdf-font-stream PDF embedded font (sfnt) at offset 0x523D 5752 bytes
font_01_sfnt_off000065ea.bin
054d1a6cfbb8b37ac34a10f9f7141de5c62e3cb62565ed9dafedc92f9b040129
pdf-font-stream PDF embedded font (sfnt) at offset 0x65EA 10536 bytes
font_02_sfnt_off00008a0f.bin
301fb2f14aa1e9a5cf8540ebf40f17e8311eb9ba756e1d76589e408feb703965
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A0F 16096 bytes