Malicious PDF — malware analysis report

Static analysis result for SHA-256 25864cbb5a81dd86…

MALICIOUS

PDF

43.8 KB Created: 2020-07-11 04:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 844ed4a10bba481302a8da5adb6bd371 SHA-1: 64545d66643184c269f14a916115a52f5dcb0609 SHA-256: 25864cbb5a81dd86dc148b07114937289337131d34f8cc88ab87f336b86ecddb
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, many of which point to external PDF files hosted on various domains. One critical heuristic indicates a malicious redirector link, and another identifies a PDF SEO link farm. The document body, though partially corrupted, contains text suggesting a PDF download 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.cc/pify?keyword=elnathan+john+becoming+nigerian+pdf+download
    • http://files.hygienistnextdoorstthomas.ca/uploads/1/3/1/8/131858747/fajumizex.pdf
    • http://files.julianoshea.com/uploads/1/3/1/4/131453807/jibumojexoje.pdf
    • http://files.fitnesswithkari.com/uploads/1/3/0/7/130776344/gunexubukam.pdf
    • http://files.wesleyshenryan.com/uploads/1/3/1/8/131871569/19c0e4c18e99227.pdf
    • http://files.catholiccharitiesvc.com/uploads/1/3/1/1/131164398/9218391.pdf
    • http://files.missgreenbayarea.com/uploads/1/3/2/6/132681824/8398990.pdf
    • https://gaxumosifa.files.wordpress.com/2020/06/gipubudugukikoketabuxad.pdf
    • https://pinegubeko.files.wordpress.com/2020/06/69294087439.pdf
    • https://godumuji.files.wordpress.com/2020/06/89004042397.pdf
    • https://kezugag.files.wordpress.com/2020/06/59945755557.pdf
    • https://cdn.shopify.com/s/files/1/0431/6590/9160/files/31805892826.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36726725464.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/gakuzogix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gizazuvolabemonixodokij.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cb8.bin
3b87951711f66a3fd9e0528b3ea585da9b18da81330c08960765f0cd3e312bfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB8 5444 bytes
font_01_sfnt_off00007f1a.bin
c042082b3ad56509d28535f4ffc05d45c893df2e89fb212649b7d73b22cfbb5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1A 10316 bytes

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