Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6e7848411dbd9fa…

MALICIOUS

PDF

49.3 KB Created: 2020-08-16 20:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8d24d42fd266723b55af6994709f568 SHA-1: 0dea36d5b847eb83dc58627d2b698b31209f4396 SHA-256: b6e7848411dbd9facff7ad82e7b897e29265b8434e886eb9e0b390e9f61baec3
150 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'The Guardian crossword answers today'. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing confirms the presence of a link to malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a tactic to distribute malicious content or manipulate search rankings. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=the+guardian+crossword+answers+today
    • http://vuzuv.jamaicanamericanbar.com/uploads/1/3/1/4/131408024/3062673.pdf
    • http://files.cowboys4heroes.com/uploads/1/3/1/4/131453858/rinuladavoliwu-wezekabuxeroro-bejixakozig-danadoxotaraxi.pdf
    • http://files.miriamruberlartist.com/uploads/1/3/1/4/131483019/828517e6fc26dc2.pdf
    • https://cdn.shopify.com/s/files/1/0433/9705/4631/files/john_deere_955.pdf
    • https://cdn.shopify.com/s/files/1/0428/6542/6598/files/97459611461.pdf
    • https://cdn.shopify.com/s/files/1/0449/4249/1816/files/luwuzexaneperege.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2043/files/pejobixudazi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/data_structures_and_algorithms_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/gofefuzu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6911/1461/files/gifinag.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3041/files/72858743943.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3302/files/18927676614.pdf
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/69281285374.pdf
    • https://cdn.shopify.com/s/files/1/0436/7260/0726/files/album_cover_finder.pdf
    • https://cdn.shopify.com/s/files/1/0428/0696/8483/files/fajizopukaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/dymo_labelwriter_450_driver.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_off00007485.bin
894570e5cebf306964ae7f488d426a6bb146d79c58940c3de865f8390ed8aa45
pdf-font-stream PDF embedded font (sfnt) at offset 0x7485 5196 bytes
font_01_sfnt_off0000863c.bin
a737e36e8f92857c3edc6cef1092ed8df89fb3a43dfb125c6ee8555ad6fc2171
pdf-font-stream PDF embedded font (sfnt) at offset 0x863C 10340 bytes
font_02_sfnt_off0000a98b.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA98B 4324 bytes