Malicious PDF — malware analysis report

Static analysis result for SHA-256 a406a856c1aaf876…

MALICIOUS

PDF

52.7 KB Created: 2020-08-19 03:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93d59bc3b8a7c3949a76e9870a3c7893 SHA-1: 3b30e24fa2f52de512f66ad3f08a296005d56865 SHA-256: a406a856c1aaf876051e6008f6ae39149809b84880b1965c5456a535bee36fdb
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, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same title as the malicious redirector URL, suggesting a lure. The primary attack pattern involves directing users to malicious infrastructure via these embedded links.

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=piche+barati+aage+band+baja+songs.+pk
    • http://files.theprayerroom.us/uploads/1/3/2/6/132682647/93fa9700f61c.pdf
    • https://cdn.shopify.com/s/files/1/0427/4785/5004/files/bukofuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/subaru_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/5241/6672/files/bixewu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1146/files/71521867687.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8909/files/kuxajarikipel.pdf
    • https://cdn.shopify.com/s/files/1/0432/4071/8496/files/rezivudizufajo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/15591684621.pdf
    • https://cdn.shopify.com/s/files/1/0436/4363/3822/files/25142927693.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zukukujumifuxutage.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/dovodirovak.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/7144095448.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/varanomavumozomadeda.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/42475779951.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005757.bin
d2a54d480d378eab8662300a436d7cab74f8ed2d27a106c66a3bc37dbe068006		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5757 5404 bytes
font_01_sfnt_off000069a8.bin
104e820722dd3c7150cc609a8e0c98f09d17fca4e7e0db66e76db1632309f658		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69A8 14772 bytes
font_02_sfnt_off000097f8.bin
dabf0ccc451caf4864c9b22ca91318a92e8f625b469dd0561edf59b451c7a792		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97F8 18776 bytes
font_03_sfnt_off0000b55f.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB55F 4324 bytes

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