Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdbf6d5a2251fa9b…

MALICIOUS

PDF

42.3 KB Created: 2020-08-06 07:13:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab989b4d5758dc0f73801855ff1bcf72 SHA-1: 4331096e834efc4c7b26a6ea1aa8ba30006a0008 SHA-256: cdbf6d5a2251fa9b4a93ff7be1d4945233d95886aa365ce39e18becbfab2b109
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=paulk+workbench+ii+pdf'. It also functions as a link farm, embedding numerous external PDF links, many of which are hosted on Shopify. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL confirms a malicious intent to lead the user to a harmful destination. No scripts were extracted from this sample.

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.com/pify?keyword=paulk+workbench+ii+pdf
    • http://pederu.albertabeachestates.com/uploads/1/3/0/7/130775823/dudumusivu_balevaxag_gedoso_bububodisa.pdf
    • http://segis.fureverpetrescue.com/uploads/1/3/1/4/131437615/nixisajorim_zepel_xowegepumizawuf.pdf
    • http://files.astiquesalon.com/uploads/1/3/0/7/130739616/fotoderiviw.pdf
    • http://files.buckandbette.com/uploads/1/3/1/8/131871568/1680042.pdf
    • http://files.nextgenerationfarms.com/uploads/1/3/1/3/131382942/4c5e6b983f2a20a.pdf
    • https://cdn.shopify.com/s/files/1/0431/0699/2289/files/52389524841.pdf
    • https://cdn.shopify.com/s/files/1/0431/3058/5250/files/zajepuxekazelopove.pdf
    • https://cdn.shopify.com/s/files/1/0431/5067/2033/files/widegeti.pdf
    • https://cdn.shopify.com/s/files/1/0436/4192/9886/files/yamaha_motif_es8.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/garul.pdf
    • https://cdn.shopify.com/s/files/1/0432/0637/7633/files/dallas_keuchel_fangraphs.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/jowavadupezet.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/50883943428.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasebiv.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_off0000649b.bin
369aebe6852b84c5a5b5adc5d26d78d27f21103c7125e146628db008559ab1b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x649B 5360 bytes
font_01_sfnt_off000076e0.bin
18ce64c22c4f85a35d1a7e1e8f3fa06016a8c81e70ae9c7dc77f8ecea6b80ec3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76E0 11936 bytes

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