Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a03769215a0e0e5…

MALICIOUS

PDF

54.2 KB Created: 2020-08-04 15:16:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fc0499a399f4b2cb8bb2a5d854e1f61 SHA-1: 031a674af2dc75e7360e1c9e7638949e024bb638 SHA-256: 5a03769215a0e0e5afc30011cb388678de7306e3684a279e6bdd8a0e039309a4
120 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at `ttraff.com`. The document body text and embedded links suggest a lure to download a "Bsc math book pdf", which is likely a pretext for delivering malware. The presence of a malicious redirector indicates an attempt to obscure the final destination of the payload.

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=bsc+math+book+pdf
    • http://files.steedgroup.org/uploads/1/3/1/0/131070866/fugadajafabujefisu.pdf
    • http://files.mrsteltman.com/uploads/1/3/1/6/131636941/97946d75095.pdf
    • http://files.brickchildrenschool.com/uploads/1/3/0/7/130738620/lozagak_wexotagudogo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/poly_fiber_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/1026/9082/files/niberijiforiresomadiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wifufokamavobopizevotug.pdf
    • https://cdn.shopify.com/s/files/1/0437/3459/7784/files/doxugizexedasunesinigi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/zosorolarifeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/96354854026.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/fixukogunapepasevuvevefej.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/56741893311.pdf
    • https://cdn.shopify.com/s/files/1/0434/3663/8369/files/lojidikuvozosurinijovuji.pdf
    • https://cdn.shopify.com/s/files/1/0435/4995/0116/files/12787324671.pdf
    • https://cdn.shopify.com/s/files/1/0446/1314/0643/files/apache_tomcat_tutorial_linux.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/i_love_you_ukulele_chords.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_off00006933.bin
f0c12ee9744e7f7a37e9a580c5b793b4888457439faca644e8adca41e4128bda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6933 5520 bytes
font_01_sfnt_off00007bcf.bin
35c0a746fcdf55e64f2ba55209f6a139fa5d4ea47dce36c63c78d1e6d66b29b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BCF 3204 bytes
font_02_sfnt_off000088c0.bin
d97e055e11de589539a249dfdf9c15aca1e9caf4700104d1763a3a5d87d8f7f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88C0 2320 bytes
font_03_sfnt_off00009312.bin
f5ad206a757a3e618e09f018507d27754ea8fb684a07d38d13f4d975acf9e732		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9312 10112 bytes
font_04_sfnt_off0000b59d.bin
207faf14306426b668b87aba0c9d447b8ba40b67f0f7b18660ffa0d3c8132265		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB59D 16224 bytes

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