Malicious PDF — malware analysis report

Static analysis result for SHA-256 acb8a838e3ba95e3…

MALICIOUS

PDF

56.5 KB Created: 2020-08-11 07:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 473cbd15da1fab3ce93d5f7d8986d8a8 SHA-1: 8357661816257e08dddb79ee76da041d70da2ead SHA-256: acb8a838e3ba95e385db7c39a483c65a2c4ba44e140e729091ba1d497998dcb6
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, appears to contain the URL for the redirector, suggesting a phishing or malware delivery attempt. The primary heuristic indicates a malicious redirector link, and the document body itself contains the URL for the redirector.

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.cc/pify?keyword=tamil+boy+baby+names+with+meaning+in+tamil+pdf
    • http://files.expeditiondance.org/uploads/1/3/2/6/132696117/kidekapomud.pdf
    • http://files.penelopewylde.com/uploads/1/3/0/7/130775063/miwuniwitut-gezinezefazop-denamulubila.pdf
    • http://files.adventurouspursuit.com/uploads/1/3/1/4/131438098/9652098.pdf
    • http://files.ridgeclinicairliebeach.com/uploads/1/3/1/4/131437862/7420840.pdf
    • http://files.australianprophecyschool.com/uploads/1/3/1/3/131398406/46bebaf8.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8369/files/public_finance_management_system.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/82483011388.pdf
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/duzijikirakamof.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8333/files/fubozogopitixewigisemeter.pdf
    • https://cdn.shopify.com/s/files/1/0435/4139/7656/files/raduvegonogimuvow.pdf
    • https://cdn.shopify.com/s/files/1/0429/3676/2527/files/cambridge_igcse_modern_world_history_ben_walsh.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/51906218884.pdf
    • https://cdn.shopify.com/s/files/1/0437/7496/7965/files/enlace_polar_y_no_polar.pdf
    • https://cdn.shopify.com/s/files/1/0437/9390/7869/files/matezenobuwajoxazit.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5861/files/vetixorazavomakuvetu.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
stream_004_off00008d2c.bin
b80a4f203b7e18417878fc68f4cdb02ec808aec83181e4e43bd6a76e7d2ffad0
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8D2C 14988 bytes
font_00_sfnt_off00007a12.bin
722e36b88127544c3867f6284e2cf03385bf4ecb693f7f99fee6faa0691537d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A12 5644 bytes
font_02_sfnt_off0000b2b1.bin
ae8db9985761bba3bab53484c39ff1bd674f11900d5fadd26721a1e5db375c0f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B1 9908 bytes