Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eb9ea2835751df0…

MALICIOUS

PDF

45.8 KB Created: 2020-08-31 11:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5eb29f57237ec84308d3866f7aea9716 SHA-1: 1131bc912c03e64389216858f5259e65d303070f SHA-256: 7eb9ea2835751df0b144efbd364a330f2f0c959932ec68c7dd065ccf81c361ab
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'ignou assignment first page pdf' and includes the malicious URL. The presence of a 'download button' heuristic further supports the lure. The primary malicious IOC is the redirector URL, which likely leads to further stages of the attack.

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=ignou+assignment+first+page+pdf
    • https://static.usrfiles.com/ugd/b8c837_1f875d4407444259a3dbeb4d55c5e712.pdf
    • https://static.usrfiles.com/ugd/b8c837_475ea5f403834e1c956264d8c682346e.pdf
    • https://static.usrfiles.com/ugd/3b47cb_cee1c0bbba9746779815e9253b77a1f0.pdf
    • https://cdn.shopify.com/s/files/1/0464/6872/6936/files/arnold_chiari_malformation_awareness_month.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/6091145869.pdf
    • https://cdn.shopify.com/s/files/1/0433/8568/4124/files/brief_summary_of_the_bible_from_genesis_to_revelation.pdf
    • https://cdn.shopify.com/s/files/1/0439/4447/6840/files/data_acquisition_system.pdf
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/45787381518.pdf
    • https://cdn.shopify.com/s/files/1/0430/4191/5042/files/gozimokiwixaposulor.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/lalito.pdf
    • https://static.usrfiles.com/ugd/105a8c_17096100a6e24259be7476b8bfccca7a.pdf
    • https://static.usrfiles.com/ugd/64f9d2_dc954940599f42ffb2c8b61cee124417.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_off00006902.bin
83167a0f87ef55b5cd3ed8bbcf7bcb07fdb026828d11bd4e7666f3fb6a340634
pdf-font-stream PDF embedded font (sfnt) at offset 0x6902 5148 bytes
font_01_sfnt_off00007a6f.bin
e9bdad95dc9054ff0cfdcb955eb9cd9c58a8520149050de9383f5fe65aa22dbe
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6F 9964 bytes
font_02_sfnt_off00009c7c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C7C 4324 bytes