Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b79a0a384556ef3…

MALICIOUS

PDF

58.0 KB Created: 2020-08-08 12:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aff42e092f793ad1e82bd58b52055d87 SHA-1: 84f69d062fbeb8d1048bb89e0f1a1808617abc04 SHA-256: 3b79a0a384556ef337cf865215655dd86d3066e2e788d89ae023a18b7f915ed8
128 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains the text 'Jolly phonics word list pdf' and the malicious URL 'https://ttraff.com/pify?keyword=jolly+phonics+word+list+pdf'. This suggests the document is designed to trick users into clicking the link, likely leading to further malicious content or downloads.

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.com/pify?keyword=jolly+phonics+word+list+pdf
    • http://files.integrativecarenj.com/uploads/1/3/0/8/130874207/594356.pdf
    • http://razur.raphaelacademy.org/uploads/1/3/2/6/132683165/9162239.pdf
    • http://files.sunfoxfarm.org/uploads/1/3/0/8/130813612/dokage_junakuxapew_varovakawujisu.pdf
    • http://files.eathorpepollherefords.com/uploads/1/3/1/3/131379868/tuvawajajozevosanox.pdf
    • https://cdn.shopify.com/s/files/1/0435/1361/0392/files/zixutolimosovakaxaxulenaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1460/files/pejumitoluw.pdf
    • https://cdn.shopify.com/s/files/1/0434/1111/2092/files/zotofigubo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4952854333.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49221060197.pdf
    • https://cdn.shopify.com/s/files/1/0431/3523/8301/files/19506795475.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/77512155024.pdf
    • https://cdn.shopify.com/s/files/1/0437/6435/1130/files/34707606382.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/79381321339.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/kuvusobexod.pdf
    • https://cdn.shopify.com/s/files/1/0428/1758/5308/files/stepper_motor_vs_servo_motor.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000799c.bin
d8cd63a2c93b63e144a5343432007fa45abe2512bc95c6bcdcf54bafdba4035c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x799C 4884 bytes
font_01_sfnt_off00008a2c.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2C 1800 bytes
font_02_sfnt_off000092ba.bin
3948e3145d5fcbbf8ac5f0846bdd06c50430ca4e0a911e6bbf228d8332b0e24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92BA 10444 bytes
font_03_sfnt_off0000b69f.bin
531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB69F 16312 bytes
font_04_sfnt_off0000cc2a.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC2A 4324 bytes

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