Malicious PDF — malware analysis report

Static analysis result for SHA-256 42c130a3abd424b1…

MALICIOUS

PDF

41.8 KB Created: 2020-08-01 11:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1524bafb1f4ab8a88c6fead71ffc3b4 SHA-1: 7fb5a00dbd4e15c72202da191cf46edb220717dd SHA-256: 42c130a3abd424b14d3dcffb34291a1a9d4a6a0f54709d083bb139d95e50b26c
128 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=wifi+hotspot+windows+7'. This URL is presented within the document body, alongside numerous other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic. The presence of a 'download button' heuristic further supports the lure-based attack pattern. The primary malicious IOC is the redirector URL.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=wifi+hotspot+windows+7
    • http://files.humanesocietyofdelnorte.org/uploads/1/3/1/1/131163705/lubonipoxeguxifavel.pdf
    • http://files.teachingreexplored.org/uploads/1/3/1/1/131164124/xevasemutitixesobuxi.pdf
    • http://files.tcdfw.org/uploads/1/3/1/6/131637255/wubux-zamebarop.pdf
    • http://files.corelliwinecompany.com/uploads/1/3/1/8/131871740/dasatozisadevaruzini.pdf
    • https://cdn.shopify.com/s/files/1/0432/3662/2498/files/riwiguwulimanakigin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/77363931764.pdf
    • https://cdn.shopify.com/s/files/1/0432/0883/5229/files/29515814441.pdf
    • https://cdn.shopify.com/s/files/1/0440/5044/8549/files/osrs_balloon_transport.pdf
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/rurez.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/26630857316.pdf
    • https://cdn.shopify.com/s/files/1/0433/1916/5086/files/polid.pdf
    • https://cdn.shopify.com/s/files/1/0437/9148/3042/files/52307536119.pdf
    • https://cdn.shopify.com/s/files/1/0433/5193/3078/files/50916897556.pdf
    • https://cdn.shopify.com/s/files/1/0434/7848/3096/files/34132538832.pdf
    • https://cdn.shopify.com/s/files/1/0432/5166/3012/files/vavoluf.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/6765556976.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/romoxokakowaveviju.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/julutason.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_off00006659.bin
71467e272a99fd3a257ebc721824ff9d9f1e63a64883b1b1f37cea6dc6f2f241
pdf-font-stream PDF embedded font (sfnt) at offset 0x6659 4976 bytes
font_01_sfnt_off00007772.bin
d5956c634f3ba39e70e7e276e15f892585aac88bdff35e9caffe0bd0c104465d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7772 10344 bytes