Malicious PDF — malware analysis report

Static analysis result for SHA-256 27057bd9c6af35a1…

MALICIOUS

PDF

56.6 KB Created: 2020-08-23 07:16:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48bd217572213b666d428ac08cfa1244 SHA-1: 5f0a8184653c96a97b18b6b98c2d7ffc09b0ea45 SHA-256: 27057bd9c6af35a18201c2b4cac50616b88f72dcbbf297c08a8b317000e02fcf
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Aranyak book pdf' and the malicious URL 'https://ttraff.cc/pify?keyword=aranyak+book+pdf', suggesting a lure for users seeking content. The presence of a link farm heuristic further indicates a malicious intent to distribute links. The file is likely a downloader or part of a phishing campaign.

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=aranyak+book+pdf
    • http://desoxokat.gracebridgeresalecelina.com/uploads/1/3/1/4/131406438/wavok.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/26801361195.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6295/files/string_to_lower_c.pdf
    • https://cdn.shopify.com/s/files/1/0436/0123/2035/files/semiw.pdf
    • https://cdn.shopify.com/s/files/1/0464/5231/0184/files/working_with_half_life_nuclear_chemistry_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/2779/9957/files/47918978410.pdf
    • https://cdn.shopify.com/s/files/1/0436/0998/1085/files/korutodojujuzorerovofet.pdf
    • https://cdn.shopify.com/s/files/1/0436/2171/2034/files/15839864476.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexanenivoxepabulolud.pdf
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/multiple_meaning_words_worksheets_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0434/9168/8610/files/kimilizorasefuluribe.pdf
    • https://cdn.shopify.com/s/files/1/0441/2653/5832/files/anarchist_library.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32506959796.pdf
    • https://cdn.shopify.com/s/files/1/0438/8857/4632/files/23135990553.pdf
    • https://cdn.shopify.com/s/files/1/0428/2862/8135/files/45480640812.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f8d.bin
be697b03c19200c705936dc293d310e23f01adfd33b70fa305279660e03b84e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8D 5120 bytes
font_01_sfnt_off00008104.bin
41cd2b5f44220442e045a9d0c6931f0ddb8b16f47fcd5a1cd7373b223636fe4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8104 8092 bytes
font_02_sfnt_off00009a93.bin
eed477044c2892e2db16151d427bccba67dd6af944d14e5e16d487c9f847fbe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A93 7160 bytes
font_03_sfnt_off0000b27a.bin
69859e847df7fe421ffd39aba07c7033ebda7a7fdac8354db89e54230b3c69e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB27A 10024 bytes

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