Malicious PDF — malware analysis report

Static analysis result for SHA-256 a67dce57b0784093…

MALICIOUS

PDF

55.5 KB Created: 2020-08-04 17:36:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 692bbd4a57d283580df0a934368a17a9 SHA-1: 144a29bc31c0b44519602d8107288c10a77d050c SHA-256: a67dce57b07840933facd29123fcb5d182731049654cd0b54d57af94d9f756dd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though malformed, contains text related to PDF conversion and a URL that is also present in the embedded links. The heuristic firings indicate the presence of malicious redirector links and a link farm, suggesting a lure to external malicious content. Additionally, a 'Clipboard command execution lure' heuristic suggests the document may instruct the user to interact with the clipboard in a way that could lead to command execution.

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=converter+pdf+para+word+candy
    • http://files.legacyofcolumbo.com/uploads/1/3/2/6/132680813/036b82564711c5.pdf
    • http://files.coldharborroadcoc.org/uploads/1/3/0/8/130874526/1572063.pdf
    • http://files.outloudtheatre.org/uploads/1/3/0/7/130775756/xolezixevikopijifi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0949/9551/files/wusagilagaxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/fubeji.pdf
    • https://cdn.shopify.com/s/files/1/0434/7713/9613/files/2005_chevy_cavalier_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0861/files/10312114653.pdf
    • https://cdn.shopify.com/s/files/1/0430/1294/8121/files/rupejotise.pdf
    • https://cdn.shopify.com/s/files/1/0433/3184/6296/files/tutam.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/62113485640.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/husqvarna_440_chainsaw_parts.pdf
    • https://cdn.shopify.com/s/files/1/0434/2025/4375/files/34065307745.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/wemurukuvi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/boneloxukenejumonejalod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61066914906.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/mowokerinevoxudarewun.pdf
    • https://cdn.shopify.com/s/files/1/0433/7847/5162/files/70161350917.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_off00008ee2.bin
55d2420c7161959eeb9ad8f5852d2a58732abf3df4d7a7cb8c0f4de6aec89f8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE2 4956 bytes
font_01_sfnt_off00009fe1.bin
71a51b3d764fb1f00875ea1cb26d1266001b6d4f2be3dbdd7dc17d25df7e4055		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FE1 10196 bytes
font_02_sfnt_off0000c2c0.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C0 4324 bytes

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