Malicious PDF — malware analysis report

Static analysis result for SHA-256 a63398fbde87a3f6…

MALICIOUS

PDF

47.5 KB Created: 2020-08-07 17:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8110118a7b4c328b55f9bc9550451b6b SHA-1: dc446c7d6d5ebfa96ad711c465f882e4089a3625 SHA-256: a63398fbde87a3f66fc3abd36a1aec409e415601746b1202384042cf80f072a1
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL 'https://ttraff.ru/pify?keyword=michelman+violin+varnish+pdf'. This suggests the document is designed to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted from this sample.

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=michelman+violin+varnish+pdf
    • http://files.twainquiry.co.uk/uploads/1/3/0/8/130814118/7092949.pdf
    • http://fogamid.rainbowlanes.info/uploads/1/3/1/3/131380729/gujuvavo.pdf
    • http://files.skippysfrenchtoast.com/uploads/1/3/0/7/130775734/rijepidokasewama.pdf
    • http://files.kateadkinstherapy.com/uploads/1/3/1/3/131383943/3685575.pdf
    • http://giputoru.karenmccannart.net/uploads/1/3/1/3/131379803/gamuwenamoxanikim.pdf
    • https://cdn.shopify.com/s/files/1/0439/1898/3323/files/witch_hunter_the_invisible_world_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/wubekilajala.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54171278856.pdf
    • https://cdn.shopify.com/s/files/1/0428/9586/8057/files/gemuwozeribefenekefegus.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5236/files/38431948473.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/metabolic_syndrome_diagnostic_criteria.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/rolixupawabatewel.pdf
    • https://cdn.shopify.com/s/files/1/0429/6278/0311/files/lavowasipezofivobix.pdf
    • https://cdn.shopify.com/s/files/1/0440/7099/4085/files/5431962222.pdf
    • https://cdn.shopify.com/s/files/1/0440/5841/1158/files/nalegixuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/8208/7588/files/45401303653.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5878/files/how_to_indent_in_discord.pdf
    • https://cdn.shopify.com/s/files/1/0437/3427/0117/files/gupewowu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0419/9075/files/body_parts_label_worksheet.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_off00006dde.bin
bb340ad29053cab9a4d6156651933e47069c282da45d1d440d238c5a08393eed
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDE 5168 bytes
font_01_sfnt_off00007f3c.bin
c76be801d8e9152963b26a3d378c42ab6070a2209158c0ffcf75b063cc75ed57
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F3C 10288 bytes
font_02_sfnt_off0000a267.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xA267 4324 bytes