Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15cd0b8182915a6…

MALICIOUS

PDF

105.7 KB Created: 2020-08-30 18:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bf5e8282929f1892f1a5b5884f718ea SHA-1: 3a0b14afbb9a92a15af836db45da4309d14bfb98 SHA-256: d15cd0b8182915a60d85298a6da9bcac70bccc2a21f1399a798a6e7730812ddb
168 Risk Score

Malware Insights

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

The PDF contains a lure for a comprehension test, which includes a link to a redirector URL (https://ttraff.cc/wix?keyword=across+the+wide+dark+sea+comprehension+test). The document also exhibits characteristics of a link farm, pointing to numerous PDFs hosted on Shopify. The presence of a 'password-protected archive lure' heuristic suggests the document is designed to trick the user into downloading an encrypted payload, which is then likely decrypted using a provided password.

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=across+the+wide+dark+sea+comprehension+test
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/jebeduzamateriv.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5805/files/1363326082.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/45906948886.pdf
    • https://cdn.shopify.com/s/files/1/0437/8217/6917/files/career_exploration_survey.pdf
    • https://cdn.shopify.com/s/files/1/0439/8094/7614/files/19767253024.pdf
    • https://cdn.shopify.com/s/files/1/0431/1816/6167/files/69291755943.pdf
    • https://cdn.shopify.com/s/files/1/0430/0007/0307/files/98031338840.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/blue_butterfly_wallpaper_hd.pdf
    • https://cdn.shopify.com/s/files/1/0430/7573/1616/files/donefug.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/62178267992.pdf
    • https://cdn.shopify.com/s/files/1/0439/9002/4350/files/memomumuxilomosigafewepa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xifadek.pdf
    • https://cdn.shopify.com/s/files/1/0441/0913/6024/files/10_amendments.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_off0000e916.bin
048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE916 6744 bytes
font_01_sfnt_off0000f9cb.bin
a9da7548eb3e2d4e762424e7a88a7efa9f3707e6115ef963bea61573001f234f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CB 15544 bytes
font_02_sfnt_off00012b75.bin
92a9ae78ef10a4351b0b662d25c69f4d00f10c3b0bdced9062b7e5c33edbfb1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B75 5428 bytes
font_03_sfnt_off00013dcd.bin
a0cfad0dedb2657bd6a6df2cefef2e2a58c28954770e3dc7dccee0ab1ea96915		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13DCD 12108 bytes
font_04_sfnt_off0001660e.bin
100f94bd830e7d0427c15f1364433d45872a4ad662f26518caea5bb29fa2c2d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1660E 21124 bytes
font_05_sfnt_off00018ac3.bin
7d8a97685385564716dc5012a70239462cc83452a566c1163162b2da169ac21c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18AC3 3332 bytes

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