Malicious PDF — malware analysis report

Static analysis result for SHA-256 a36900bc2bc58bac…

MALICIOUS

PDF

48.9 KB Created: 2020-07-12 05:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ffbb43f793fbd19a0e00f99bc3e3c01 SHA-1: ea437461f4388cd153b3cd1e283af2d5228fbd1e SHA-256: a36900bc2bc58bac77af4b07f079e18b64daf4e1fc0415c1fcd2b091d7543902
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many URLs pointing to PDF files hosted on various domains. One of the primary links, 'https://ttraff.ru/pify?keyword=T%25C3%25BCrk%25C3%25A7e+literature+s%25C3%25B6zl%25C3%25BCk+%25C3%25A7evrimi%25C3%25A7i', is identified as a malicious redirector. This indicates the document's purpose is to lure users to malicious sites, likely for phishing or to download further malware.

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=T%25C3%25BCrk%25C3%25A7e+literature+s%25C3%25B6zl%25C3%25BCk+%25C3%25A7evrimi%25C3%25A7i
    • http://files.mollywhitman.com/uploads/1/3/1/4/131437983/wogibup-dudajoweja.pdf
    • http://files.vieparlafoi.com/uploads/1/3/2/7/132740870/kevuxugovurok_govesajidi_nukimaz_puvomabak.pdf
    • http://files.321run4ds.org/uploads/1/3/1/4/131453934/3566387.pdf
    • http://files.bluebirchoutfitters.com/uploads/1/3/1/3/131398091/2065090.pdf
    • http://files.crystalclearwindowcleanersuk.co.uk/uploads/1/3/1/4/131409761/pulopukijux.pdf
    • https://cdn.shopify.com/s/files/1/0432/2135/2606/files/kukivupuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/vusikifabopilones.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/jaleluzuni.pdf
    • https://woxobugob.files.wordpress.com/2020/06/17371539047.pdf
    • https://jibixixe.files.wordpress.com/2020/07/koxategisutupesadigoluka.pdf
    • https://gofodalegu.files.wordpress.com/2020/07/18441914067.pdf
    • https://disosilawube351438687.files.wordpress.com/2020/06/pisenemiledowipuzata.pdf
    • https://cdn.shopify.com/s/files/1/0432/4655/1208/files/23469033555.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6563/files/18252376821.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/befuxaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/93883503473.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/60291006270.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/datumaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/3066/7673/files/pitubopubogevese.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61053474184.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_off000074ac.bin
52e888ebd64955f8f87c4ea10a5613a63f74351f78c76c9eaf6e059d87f52a10
pdf-font-stream PDF embedded font (sfnt) at offset 0x74AC 5060 bytes
font_01_sfnt_off000085c1.bin
8ecca808ed47931a5b78a7ccff50e596b8d5cc944a6730e08d3185fc0648adab
pdf-font-stream PDF embedded font (sfnt) at offset 0x85C1 15824 bytes