Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1eec9ba96476423…

MALICIOUS

PDF

43.7 KB Created: 2020-07-28 17:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44ca46dd994f512ea8a23c1c0fa53a6f SHA-1: 3601e0e4d8797c6d1c4a900d225314a23d733b49 SHA-256: b1eec9ba964764236027ddd09db8ee571a4b8fe3b17d35f06c16195d655a4222
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm for SEO manipulation or traffic redirection. The presence of the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic further supports the malicious intent. While no scripts were extracted, the structure and heuristics point towards a malicious redirection scheme.

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.ru/pify?keyword=child+dance+status+video
    • http://files.seiklevabaks.com/uploads/1/3/0/7/130739265/b3c5563578.pdf
    • http://files.herveybaywhalecity.com/uploads/1/3/2/6/132681992/gitukufa.pdf
    • http://files.fitscience.net/uploads/1/3/0/7/130740183/kokabedop_ritemozaxino.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/74049717195.pdf
    • https://cdn.shopify.com/s/files/1/0431/4890/2556/files/5252822765.pdf
    • https://cdn.shopify.com/s/files/1/0436/2479/2224/files/fupomavolalenubetobumi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0595/8565/files/xobezoda.pdf
    • https://cdn.shopify.com/s/files/1/0437/1120/1435/files/49502057221.pdf
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/jotivat.pdf
    • https://cdn.shopify.com/s/files/1/0430/9277/0977/files/45477518865.pdf
    • https://cdn.shopify.com/s/files/1/0436/9245/8139/files/60762839397.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58014629257.pdf
    • https://cdn.shopify.com/s/files/1/0437/0658/1147/files/digilupifobifegedawinoz.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/87041320854.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/pegitiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52665001447.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_off00006e08.bin
dcc79003af1c57522d3e994646cb6f3d3b62569ed29e9542608852f56729446c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E08 4896 bytes
font_01_sfnt_off00007eaa.bin
798bc50751272088b42fcc1dc763d310c0aec16a804a6c8e65bcc701402bddf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAA 10220 bytes

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