Malicious PDF — malware analysis report

Static analysis result for SHA-256 27bb77ebb7895027…

MALICIOUS

PDF

44.7 KB Created: 2020-09-22 03:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00a65528053f4dd2b8c4b30fba31fc2f SHA-1: 396a8a99aa292972be95089e2b05cfe9f2c9b7ef SHA-256: 27bb77ebb7895027781665ef54f70b878dd65438d3782d2847683fca460ede59
128 Risk Score

Malware Insights

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

The PDF file contains a link farm and a direct link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'secured promissory note template texas' and includes the malicious URLs, suggesting a lure to trick users into clicking the links. The presence of a visual download button heuristic further supports the social engineering aspect of this 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.ru/pify?keyword=secured+promissory+note+template+texas
    • http://files.buildhealthyseniors.com/uploads/1/3/1/6/131606642/437267614cc.pdf
    • http://dijaj.alexandrakwilson.co.uk/uploads/1/3/0/7/130775583/9739368.pdf
    • http://papiwij.rebecca-art.com/uploads/1/3/1/0/131070357/jusej_zigigugapiwaw_dixobop_monoxidawunul.pdf
    • http://sejenuje.housela.org/uploads/1/3/1/6/131606051/3245952.pdf
    • http://kunusa.kiahwilson.com/uploads/1/3/1/4/131437987/baxudepalu.pdf
    • http://zipejisuk.richmondbulldogs.org/uploads/1/3/1/4/131438110/d5edfa380.pdf
    • http://waparalu.photographybycarrie.co.uk/uploads/1/3/1/4/131437699/ruvabifex.pdf
    • https://45fa1af3-e6a2-4bbb
    • https://cdn.shopify.com/s/files/1/0469/0486/9024/files/jizupumunod.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8973/files/43829603075.pdf
    • https://cdn.shopify.com/s/files/1/0435/9494/0575/files/english_language_learning_free_download.pdf
    • https://1881bb03-4eee-44dc-84b4-111cc462be0f.filesusr.com/ugd/f91cf1_dfda9cbed56c4b82a7e7cf5e7b63f256.pdf?index=true
    • https://254e757f-22bb-4522-9d22-c16f78fb34de.filesusr.com/ugd/4bb894_8ee03d43d3dc4354b8ad4bb73e322ee8.pdf?index=true
    • https://45fa1af3-e6a2-4bbb-9f16-c1331be038f4.filesusr.com/ugd/95ea6b_918cfb799bdc48cbb2d3b96c800eb87d.pdf?index=true
    • 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_off000061f2.bin
c06f8f8e3266a431d9b38183163de70ea9dae493ec8b23e88207df8e4ff67768
pdf-font-stream PDF embedded font (sfnt) at offset 0x61F2 5372 bytes
font_01_sfnt_off0000741b.bin
e5cd02593e4120b65fe7058d3fc3afb5dd587ec27063f7b4ba06a5376fa77dc3
pdf-font-stream PDF embedded font (sfnt) at offset 0x741B 10264 bytes
font_02_sfnt_off00009738.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x9738 4324 bytes