Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ddaae15f5710355…

MALICIOUS

PDF

37.1 KB Created: 2020-09-01 22:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 911ab5b1621422353a57be606c06183d SHA-1: 02b8c4b111243029641c4176329463333ac826e8 SHA-256: 1ddaae15f571035519d14e1f2bc64ef9477c3ed569ddf9d5ac3f3022ba49c9fb
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting an SEO link farm tactic. Crucially, one of the embedded URLs, 'https://ttraff.cc/wix?keyword=4g+lte+switch+apk+free', is identified as a malicious redirector. This indicates the document's primary purpose is to redirect users to malicious content, likely for malware distribution or phishing.

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/wix?keyword=4g+lte+switch+apk+free
    • https://cdn.shopify.com/s/files/1/0433/7729/5516/files/siwaduje.pdf
    • https://cdn.shopify.com/s/files/1/0435/8563/4463/files/practical_bacteriology.pdf
    • https://cdn.shopify.com/s/files/1/0436/4078/3008/files/74462673407.pdf
    • https://cdn.shopify.com/s/files/1/0431/7334/7488/files/97725397585.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/raxinopapebato.pdf
    • https://cdn.shopify.com/s/files/1/0434/6504/8214/files/tekken_3_pc_game__30mb.pdf
    • https://cdn.shopify.com/s/files/1/0432/1506/1153/files/83988876738.pdf
    • https://cdn.shopify.com/s/files/1/0435/3723/6117/files/valve_source_engine.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/waxukifusiroritiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0077/4308/files/80373671046.pdf
    • https://cdn.shopify.com/s/files/1/0433/0425/5656/files/vugawobomonadaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5122/9089/files/87845370468.pdf
    • https://cdn.shopify.com/s/files/1/0433/1179/2286/files/31066538571.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_off00005281.bin
4daad908efc79b99eb5ba42b78a08b61da3cf0d539bf0677da42d9e0b19baeef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5281 5424 bytes
font_01_sfnt_off00006510.bin
1989bbe5f9799e4ea3b20de19ca7e162961d25f3d435a9f6708710318f35658f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6510 10220 bytes

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