Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc10cb1707f5d7b…

MALICIOUS

PDF

42.3 KB Created: 2020-08-02 19:13:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f02fbc6d747acff4256a6ec0d60e2f6 SHA-1: 5ad8ddcb2b643ca228aef9e3486adbc8a6745c2a SHA-256: abc10cb1707f5d7be5bbc3df4dc34d23bbdce3b6fe4ae8cbf757d7e4826fcfbf
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates a direct link to malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests a large number of external links, many hosted on cdn.shopify.com, which are likely part of a link farm to manipulate search engine results or distribute malicious content. The document body contains garbled text and a URL that appears to be part of the link farm, further supporting the attack pattern.

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=verifone+vx520+troubleshooting
    • http://files.ellennidanes.com/uploads/1/3/1/6/131606121/zemavezefu_tekogomubi.pdf
    • http://files.clydemarconstruction.com/uploads/1/3/0/7/130776875/9160101.pdf
    • http://files.spokenred.net/uploads/1/3/1/4/131406036/8789865.pdf
    • https://cdn.shopify.com/s/files/1/0437/7162/5634/files/wozewebefaterig.pdf
    • https://cdn.shopify.com/s/files/1/0429/3053/6614/files/nnat_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/fekutajaju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72593533024.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/pofazosoleletonadifurasuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/646255477.pdf
    • https://cdn.shopify.com/s/files/1/0431/7020/1760/files/cost_accounting_15th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/7042/2180/files/66206897719.pdf
    • https://cdn.shopify.com/s/files/1/0432/3514/7933/files/firevuvejuvunotirozod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pazobezosajage.pdf
    • https://cdn.shopify.com/s/files/1/0433/4996/6998/files/takokexejadagetigufulig.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_off00006644.bin
e1ca42c23daa67ed39efada0824263f56888ccb9ee5f0e78609e36ea4bc8a6b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6644 5452 bytes
font_01_sfnt_off000078dc.bin
036714aad640d389c93ecea2a6a09851dba7dca91902b4ea278f5321d1eecc39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78DC 10436 bytes

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