Malicious PDF — malware analysis report

Static analysis result for SHA-256 36b3eb4e8a917fd3…

MALICIOUS

PDF

43.3 KB Created: 2020-09-01 09:37:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43b018d63e82077af1e34d9bb3b3d251 SHA-1: 8a5bd19dd57403d25ca9783df4a7f7b7928c3f1a SHA-256: 36b3eb4e8a917fd36d47ec40892608ae3b2b35486eb3b03c78895c5bdf7bc5bf
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the same keyword found in the malicious URL, suggesting a lure. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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.me/wix?keyword=bala+bala+bhajan++video
    • https://static.usrfiles.com/ugd/bf650e_b338ec9506a64d49b799482f2a8f90d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_26397b6645d746d1ac7d26d6c6e962f1.pdf
    • https://static.usrfiles.com/ugd/bf0735_7b77cf483b7f4746ab8d84190b255f16.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7fb09465e844f60a5f78eeb576c7fdd.pdf
    • https://static.usrfiles.com/ugd/7f929b_de429cd60ce0461e972dd9e4721c558e.pdf
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/xivupa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/ruxigevefavujuredo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2002/4989/files/36063153576.pdf
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/41780366769.pdf
    • https://cdn.shopify.com/s/files/1/0428/8921/6167/files/xinadojubo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/1264999074.pdf
    • https://cdn.shopify.com/s/files/1/0434/1055/5041/files/brainwashed_republic_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/18851586852.pdf
    • https://cdn.shopify.com/s/files/1/0435/8003/1137/files/65836178831.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_off00005092.bin
40af20ad4826464eece0ac0c521519696c32b6275838886fb7bd6c173e34b69e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5092 4964 bytes
font_01_sfnt_off0000617a.bin
04f7f674012ed4568a8cbbdf2b32142c3db7fdcdb6deda7059eef4703b7aabb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617A 10224 bytes
font_02_sfnt_off000084d0.bin
912ff62fc51187dc4852bf13fa22235d1c654f39a3a500bbe45c4cd022bbae64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84D0 8188 bytes

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