Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea7a5c2a4d2e6eed…

MALICIOUS

PDF

34.9 KB Created: 2020-08-18 19:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a79e7d8d2ac58fc3c7651ecfdd438f7 SHA-1: c6dd8c1dc771916c417718c12cec18e26be165f0 SHA-256: ea7a5c2a4d2e6eedc242671d323f64f8b0d24e8d3aaab8d00787abb16d8bee4f
120 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as an annual report. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the embedded URL https://ttraff.com/pify?keyword=infrastructure+and+projects+authority+annual+report+2015 leads to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic suggests a mass of external links, with cdn.shopify.com being a dominant host, though many of these appear benign. No scripts were extracted from this sample, but the presence of the malicious redirector is sufficient to classify 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.com/pify?keyword=infrastructure+and+projects+authority+annual+report+2015
    • http://files.shakespearefreelibrary.com/uploads/1/3/2/7/132740204/veduwoduvujapakobusi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2480/0154/files/drill_doctor_750x_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/1305/4357/files/xujekaginuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/42076841326.pdf
    • https://cdn.shopify.com/s/files/1/0429/2686/6599/files/33019495277.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4685/files/c_resize_bitmap.pdf
    • https://cdn.shopify.com/s/files/1/0436/4586/2041/files/entry_level_mining_cover_letter_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/3038/0698/files/78300290273.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1581/files/63131712934.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_off000048e2.bin
996ddfc715dc8fb4ab0a0bc11ebcd4ab669315dccd4dbafda5cbbae81a5183e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48E2 5808 bytes
font_01_sfnt_off00005caf.bin
c6e07bf62c989f55ea4b2495c4ae03d80c1f399691b0d24c133cf088a22c03e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CAF 10000 bytes

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