Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca4b84a617af6c7…

MALICIOUS

PDF

43.8 KB Created: 2020-08-01 23:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59fe36a59d4d2d7103dd8aa7a2ffc931 SHA-1: 7e23f00a972e3506dbe0ca0a19b70adf755725d2 SHA-256: 1ca4b84a617af6c71f476cfd5000830c17cc7b2bdf95e0eb8dee8c7cb8f2ace4
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 Shopify domains hosting other PDFs, forming a link farm. One critical heuristic firing indicates a direct link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, also contains the malicious redirector URL and several Shopify URLs, reinforcing the link farm and redirection attack pattern. No scripts were extracted from this sample.

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=lord+of+the+flies+litcharts
    • http://files.tarajanellephotography.com/uploads/1/3/1/6/131637211/gumatoligela.pdf
    • http://files.burnsdayschool.com/uploads/1/3/0/7/130775772/4810633.pdf
    • http://files.suderve.com/uploads/1/3/2/7/132740445/30210e.pdf
    • https://cdn.shopify.com/s/files/1/0437/6353/1933/files/gedidoxelepudusiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/3909/6986/files/67725458794.pdf
    • https://cdn.shopify.com/s/files/1/0429/3571/3958/files/gebodozidilesupudepoxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/8382/4294/files/bekorutolifipup.pdf
    • https://cdn.shopify.com/s/files/1/0434/0462/4021/files/fejekape.pdf
    • https://cdn.shopify.com/s/files/1/0437/3420/4568/files/bugipapewazepavu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7982/files/38840113890.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27621352833.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/46766937156.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/88782157838.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70339383958.pdf
    • https://cdn.shopify.com/s/files/1/0436/9452/2518/files/43273125431.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062ee.bin
c545f672077d0efb9687475af9d798fd82730c964b1e3697fff2cde59db7f101		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62EE 4732 bytes
font_01_sfnt_off00007314.bin
8fccc7d9075339b7ece2dc3aaf5b2ef2400234c9c4668889eef340bc1f00d62d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7314 9768 bytes
font_02_sfnt_off00009480.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9480 4324 bytes

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