Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd5ad745c69429f9…

MALICIOUS

PDF

101.1 KB Created: 2020-08-10 07:39:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b945f3f9846ebe6feb00e2100d39f80 SHA-1: f98741f2b55a51e0c7c4cfe607cbdab63e14814e SHA-256: cd5ad745c69429f9ed100d22cda51300118ee7ca07b7988ffeeec270004eae7f
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDFs, a technique often used for SEO manipulation or to host malicious content. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=quartz+crystal+equivalent+electrical+circuit+pdf`. This suggests the document is designed to redirect users to malicious sites.

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=quartz+crystal+equivalent+electrical+circuit+pdf
    • http://files.comledcenter.com/uploads/1/3/1/4/131482823/binakin.pdf
    • http://dafufugat.aerosportoutfitter.com/uploads/1/3/2/8/132814930/6349438.pdf
    • http://files.celiagaertig.com/uploads/1/3/1/4/131414561/c55a09e425909.pdf
    • http://files.compellingministries.com/uploads/1/3/1/4/131437183/lisopetizisuritu.pdf
    • http://files.globalmusicsong.com/uploads/1/3/1/3/131384407/59eaed6b.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4367/files/caderno_com_desenhos_para_colorir.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/satoxomiboxedafimixe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/katomupezolelapixuzigozuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/45618578351.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/zuwofofobon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20659662050.pdf
    • https://cdn.shopify.com/s/files/1/0434/7225/7181/files/94438229280.pdf
    • https://cdn.shopify.com/s/files/1/0435/9494/0573/files/dojifekufasu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4981/files/57186924254.pdf
    • https://cdn.shopify.com/s/files/1/0428/6958/8135/files/25411096767.pdf
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/90689347845.pdf
    • https://cdn.shopify.com/s/files/1/0432/2420/3424/files/12414799012.pdf
    • https://cdn.shopify.com/s/files/1/0432/0739/3439/files/bokewekijov.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/
    • https://cdn.shopify.com/s/files/1/0431/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000135a5.bin
eec26372a7774f33d8af54083b16e024e2a0edb6013f840773cbf1b8e4b78541
pdf-font-stream PDF embedded font (sfnt) at offset 0x135A5 5548 bytes
font_01_sfnt_off000148a2.bin
8c46c1c483fd46d28fbd0424f9bf8d098014e1a9a4f6ab0839bc7686a72db67e
pdf-font-stream PDF embedded font (sfnt) at offset 0x148A2 12008 bytes
font_02_sfnt_off000170c5.bin
8012328a63dcefc1ca07de26b0e4d4cfd29cf9a85e65ab6d4cde1da99e7ea892
pdf-font-stream PDF embedded font (sfnt) at offset 0x170C5 16256 bytes