Malicious PDF — malware analysis report

Static analysis result for SHA-256 a63baa8af88345b7…

MALICIOUS

PDF

41.9 KB Created: 2020-07-12 02:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ea9567bb7fd5897139904340de3ff0b SHA-1: 49ea37b02e540874ff52215808a88bdd6ce35b10 SHA-256: a63baa8af88345b726b64e8f64c848edb76fdd9bff553d4cbe68c48b3a054c79
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to domains that host further PDF files. One prominent link directs to 'ttraff.com', a known malicious redirector. The document body, though heavily obfuscated, contains text related to factoring trinomials and includes the malicious URL, suggesting a lure to trick users into visiting a malicious site. The presence of a link farm and a malicious redirector indicates a campaign focused on driving traffic to potentially harmful content.

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/wb?keyword=factoring%20trinomials%20worksheet%20algebra%202%20answers
    • http://files.norcalsmartvestorpro.com/uploads/1/3/2/7/132710655/96f0fa3.pdf
    • http://files.maumeebaycarvers.com/uploads/1/3/1/1/131163561/1948891.pdf
    • http://files.kriti-jain.com/uploads/1/3/0/7/130775837/1aba70.pdf
    • http://files.alllittlerockstars.com/uploads/1/3/0/7/130738881/zuzilalakoli.pdf
    • http://files.absolutepartydjs.com/uploads/1/3/0/7/130775834/bezuroku-ruzinakitaziki-kemora-viporilugefiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nejoxalivivurotuzepebibus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38970143778.pdf
    • https://cdn.shopify.com/s/files/1/0430/1724/0733/files/89777690181.pdf
    • https://cdn.shopify.com/s/files/1/0428/7542/0835/files/ripoguwasenexozuno.pdf
    • https://fajadofavano.files.wordpress.com/2020/06/favizitam.pdf
    • https://perukawapowe.files.wordpress.com/2020/06/36436217894.pdf
    • https://zolibuvove523289473.files.wordpress.com/2020/06/98006782788.pdf
    • https://wogeberej.files.wordpress.com/2020/06/butojalakim.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7584/files/lubejidafagiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97428896976.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56655156305.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1706/files/26935438800.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/58322740709.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8306/files/11219125703.pdf
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/67033183714.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_off00006647.bin
6e037ee2c57b4cb4e2ee725023141c4d18d683b75daf30c79402d6f723312772
pdf-font-stream PDF embedded font (sfnt) at offset 0x6647 5384 bytes
font_01_sfnt_off00007876.bin
282e16bb6e5abf37cec183ced4cbba3ed1dc4eba05a88158f026ad5a9dc5e48b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7876 9884 bytes