Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a1b677c1c6fa3a8…

MALICIOUS

PDF

50.0 KB Created: 2020-08-03 23:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff63757653be75e9e08509a39127ade7 SHA-1: badb079500053917ced7d3fcfd86c862750184f5 SHA-256: 7a1b677c1c6fa3a878a8bf38b6c1b3d32248ff8b2253cde2cb384daaabca19ab
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to potentially malicious redirectors. The primary malicious URL identified is https://ttraff.ru/pify?keyword=aspectos+biologicos+de+la+adolescencia+pdf. The document body itself contains garbled text but also includes the same malicious URL and a list of other URLs hosted on various domains, suggesting a link farm or redirection scheme. No scripts were extracted, but the heuristic firings indicate a malicious redirector and a link farm, pointing towards a phishing or malware distribution attempt.

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=aspectos+biologicos+de+la+adolescencia+pdf
    • http://files.shellknoblakegirl.com/uploads/1/3/0/9/130970003/11d176c7a98e5b.pdf
    • http://lurigazi.threadsofmeaning.com/uploads/1/3/1/4/131437812/9b14556.pdf
    • http://files.westwoodrotarynj.org/uploads/1/3/0/7/130776060/xebaware.pdf
    • http://files.missymoreno.com/uploads/1/3/1/0/131070842/a0360f308.pdf
    • http://files.felicitasdoula.com/uploads/1/3/0/8/130874394/8512505.pdf
    • https://cdn.shopify.com/s/files/1/0449/6493/7896/files/git_branch_name_conventions.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15843942414.pdf
    • https://cdn.shopify.com/s/files/1/0432/4048/9122/files/fowajoziponukivusete.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/jenurexemije.pdf
    • https://cdn.shopify.com/s/files/1/0432/7407/6315/files/32281801571.pdf
    • https://cdn.shopify.com/s/files/1/0431/6105/9477/files/32006054259.pdf
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/57146995934.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0021/files/ditulugitovomu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7016/7966/files/temagagezejumelaxowizus.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/90914529379.pdf
    • https://cdn.shopify.com/s/files/1/0437/3417/1800/files/rixobuwuduge.pdf
    • https://cdn.shopify.com/s/files/1/0437/6877/4814/files/45900520575.pdf
    • https://cdn.shopify.com/s/files/1/0437/2057/3080/files/3978176865.pdf
    • https://cdn.shopify.com/s/files/1/0433/3466/4347/files/40731921056.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_off0000815f.bin
1d5774d50339f0b7a12442d07fd2501a765b1e1ac5773ea45dbf097c08c28c1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x815F 5356 bytes
font_01_sfnt_off000093aa.bin
bdee620983d41fe110ebec420e415e5ae4cfa2372b78df5a2fc4a0f1bb2b950f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93AA 11656 bytes

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