Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e5828ecc4545325…

MALICIOUS

PDF

42.1 KB Created: 2020-08-21 15:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c20c1a012c1e11195fcdb35ab4a9a6eb SHA-1: b18ea0317625f6169fb1ede09a7a4e8c4e156eae SHA-256: 8e5828ecc4545325ec9097c7bf534412efa8c4a73627e30951a57c8ef9c5f398
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector pointing to 'https://ttraff.ru/pify?keyword=anno+1404+crack'. Another critical heuristic identified a PDF link farm with 22 external links, many hosted on cdn.shopify.com. The document body, though heavily corrupted, contains fragments suggesting a lure for 'Anno 1404 crack'. The combination of malicious redirectors and a link farm strongly suggests a social engineering attack aimed at distributing malware or facilitating further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=anno+1404+crack
    • http://lulopijus.bagendstudio.net/uploads/1/3/0/7/130775169/2af33a066.pdf
    • http://xipajoko.brigetteburns.com/uploads/1/3/1/3/131384201/ee000cdaa13.pdf
    • https://cdn.shopify.com/s/files/1/0429/7703/4399/files/android_string_resource_to_charsequence.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/kivaxipifibunesof.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/rotigosonokumonugeri.pdf
    • https://cdn.shopify.com/s/files/1/0436/7394/4217/files/offensive_security_certified_professional_complete_self_assessment_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/6331211953.pdf
    • https://cdn.shopify.com/s/files/1/0434/6540/8662/files/76059824183.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5737/files/synthesis_and_characterization_of_cds_nanoparticles.pdf
    • https://cdn.shopify.com/s/files/1/0429/6704/0154/files/juludazagugugokumuxaberet.pdf
    • https://cdn.shopify.com/s/files/1/0430/0200/3615/files/pujir.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_off00006734.bin
0bb658c1672875ad100cf2bde32e058bbdca1b868a897acc508ee699f360c3a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6734 4916 bytes
font_01_sfnt_off000077fc.bin
8ac065d376c4abbaed604e3b0259543281316224f811093f5344f804d9998054		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77FC 10688 bytes

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