Malicious PDF — malware analysis report

Static analysis result for SHA-256 95d9e6fb3ebadcf1…

MALICIOUS

PDF

40.2 KB Created: 2020-08-19 09:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 750647dedd31abe2f1fb1f40124f1b4a SHA-1: 57340ccf4e2b450b497dc8bd10b845e4116dcc60 SHA-256: 95d9e6fb3ebadcf103c831f17e694fcc58514bca8292d1860a2ce0a776b233ba
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. The primary malicious URL, 'https://ttraff.ru/pify?keyword=warehouse+inventory+spreadsheet+sample', is designed to lure users into clicking by masquerading as a useful document. The PDF structure itself is minimal, suggesting its primary purpose is to host these malicious links.

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=warehouse+inventory+spreadsheet+sample
    • http://xeseda.aaautotec.com/uploads/1/3/1/4/131482853/fizez-nukirarimofalu-kaxabadurew.pdf
    • http://files.maritzavives.com/uploads/1/3/2/8/132815346/zotowelew_lotavapibo_zevubebesoden_sodagufeje.pdf
    • https://cdn.shopify.com/s/files/1/0435/8343/9003/files/sk8er_boi_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/9721/8471/files/vafakibal.pdf
    • https://cdn.shopify.com/s/files/1/0429/0412/5599/files/79936953182.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/65639635462.pdf
    • https://cdn.shopify.com/s/files/1/0438/6829/1227/files/design_thinking_empathize.pdf
    • https://cdn.shopify.com/s/files/1/0437/9282/6517/files/muwonog.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/febokijo.pdf
    • https://cdn.shopify.com/s/files/1/0445/4963/6255/files/latest_jobless_claims_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/1657/6424/files/the_abundance_factor_book.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_off00005eab.bin
c34f9b1f00b1dfe94c2343909299da3831b5d2e67dcc04b8efdeaa33a1e97cde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAB 5376 bytes
font_01_sfnt_off000070d8.bin
6c4e356e0474f1cd8f3d1999c2db5b6f262ab1a4229e14e77454091c72182f8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D8 10308 bytes

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