Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ef723486dc7c3c5…

MALICIOUS

PDF

42.2 KB Created: 2020-08-07 08:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 426c37cf51bb25ce14cf85b8d65d95d9 SHA-1: dee169209b49aa2039125e95e42fb1278bd016b3 SHA-256: 1ef723486dc7c3c57d64f5dabf39650fdb7c8412d0d59b914ef8ccf4b9d55239
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'cardiac surgery instruments pdf' and the malicious URL. This suggests a phishing or social engineering attack where the user is tricked into clicking the link, which then leads to malicious content. No scripts were extracted from this sample.

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=cardiac+surgery+instruments+pdf
    • http://files.megastone100.com/uploads/1/3/1/4/131408537/birumiloxis_sepilanonefop_nitolufedesovel.pdf
    • http://files.stdamianeclc.com/uploads/1/3/0/7/130775016/kexefamiba.pdf
    • http://files.unfilteredperspectives.com/uploads/1/3/1/3/131380213/8614881.pdf
    • http://files.alignwellnesscare.com/uploads/1/3/1/3/131379732/b482ac7b.pdf
    • http://files.familyintervention-center.org/uploads/1/3/1/1/131164567/foletikan_fusevej_nekunelimivase.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/livros_cecilia_meireles.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0728/files/zubalimududoniku.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/98288020662.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7934/files/jamapurifimofewodudiner.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45366335679.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/24741731366.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/31441968368.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/gujekezef.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/28666023737.pdf
    • https://cdn.shopify.com/s/files/1/0434/7074/9849/files/convert_to_word_document_free_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/9325/3526/files/64173218113.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fatexuxutul.pdf
    • https://cdn.shopify.com/s/files/1/0429/5278/6074/files/loriwomogonegukekoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/1610/0776/files/how_to_convert_mht_to.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_off000065d3.bin
904c4c81b3188214e5e4f2525f894224107ab1c12160dce0d476556549c76bb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x65D3 5448 bytes
font_01_sfnt_off0000784e.bin
30efc9af5facf10328f99281f59669df5e4894d00074853865ac3ffa77614f6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x784E 10508 bytes