Malicious PDF — malware analysis report

Static analysis result for SHA-256 525ca4bad19bfb22…

MALICIOUS

PDF

46.5 KB Created: 2020-08-04 01:34:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75e9fdb8d88287273e23742011b3f4fc SHA-1: 504a5ee2345755e8fac5122c931c31add2d1f0db SHA-256: 525ca4bad19bfb22ea540a4391b0f648ddc79f7a19ada0ae867a4a2d1d13e05f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that one of the links leads to known malicious infrastructure. The 'PDF_SEO_LINK_FARM' heuristic further suggests that the document is designed to artificially inflate search engine rankings by linking to numerous external resources. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=breeding+ornamental+plants+pdf', which is flagged as malicious.

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.cc/pify?keyword=breeding+ornamental+plants+pdf
    • http://tuvodega.annablossom.us/uploads/1/3/1/8/131856543/766477.pdf
    • http://files.theresaburkhartphotography.com/uploads/1/3/2/6/132682913/182a27a8dffa811.pdf
    • http://files.solodarchi.com/uploads/1/3/1/1/131164157/podumu.pdf
    • http://files.albamccance.com/uploads/1/3/2/6/132695714/xiwowudizomak.pdf
    • http://files.bkyogapsychotherapy.com/uploads/1/3/1/8/131857315/4048075.pdf
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/kajaxevas.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5093/files/jobilogunuxokuge.pdf
    • https://cdn.shopify.com/s/files/1/0435/7239/6193/files/fobarovugopigara.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/zonivi.pdf
    • https://cdn.shopify.com/s/files/1/0447/3847/8229/files/cover_letter_for_job_application_example.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1649/files/20119396447.pdf
    • https://cdn.shopify.com/s/files/1/0434/6766/9654/files/74148114766.pdf
    • https://cdn.shopify.com/s/files/1/0440/5844/3941/files/97662323765.pdf
    • https://cdn.shopify.com/s/files/1/0436/5520/0918/files/gikebes.pdf
    • https://cdn.shopify.com/s/files/1/0432/6067/4198/files/88220002025.pdf
    • https://cdn.shopify.com/s/files/1/0436/4202/8182/files/56960516633.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/57170192522.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7253/files/rabuvi.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_off000076ba.bin
aba5681c52529fd88bb5e174feee476897dda71c9836f8713fafd2d6a2b98f28
pdf-font-stream PDF embedded font (sfnt) at offset 0x76BA 5408 bytes
font_01_sfnt_off00008908.bin
0eafb6eec92ac0828a49d2cf6306185e43237609f3905e432babb4482719e745
pdf-font-stream PDF embedded font (sfnt) at offset 0x8908 10500 bytes