Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfe405afa7dea078…

MALICIOUS

PDF

41.8 KB Created: 2020-08-17 02:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6210ac2432f4480f45b8e2f0d66a439 SHA-1: cc8da69b5cc63ce5ef05872a5778df0422072d69 SHA-256: dfe405afa7dea078fe7cfd3b849e114f57ea14495f0be7c1b6325362528d2baa
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=facebook++for+nokia+c3', is identified as a malicious redirector. The document also contains a visual download button lure, suggesting a social engineering attempt to trick the user into clicking the malicious link. The ultimate goal appears to be directing users to a collection of PDFs, likely for further malicious activity or to inflate SEO metrics for malicious purposes.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=facebook++for+nokia+c3
    • http://zimizutef.masterclassbudapest.com/uploads/1/3/2/8/132815176/mugit-kunivekowijo-xosorukafedasi.pdf
    • http://files.brehenderson.com/uploads/1/3/0/7/130739856/fabenurelutaza_dajami.pdf
    • http://files.mhfaraj.net/uploads/1/3/1/1/131163772/7647663.pdf
    • http://jopiw.alittledevotion.net/uploads/1/3/1/4/131437984/9424280.pdf
    • http://tubosixe.darbodus.com.au/uploads/1/3/0/8/130874063/1814bdbd63660.pdf
    • https://cdn.shopify.com/s/files/1/0439/3464/6440/files/jovipufiwegasujujowudu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/buvugizaxebu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6960/2981/files/63265267465.pdf
    • https://cdn.shopify.com/s/files/1/0434/6527/7605/files/56722829703.pdf
    • https://cdn.shopify.com/s/files/1/0448/4320/4765/files/varillas_roscadas_medidas.pdf
    • https://cdn.shopify.com/s/files/1/0438/4584/5152/files/puliba.pdf
    • https://cdn.shopify.com/s/files/1/0430/1524/1891/files/gdpr_right_to_be_forgotten_request_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/kebiririzu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6945/7063/files/luwutolijik.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3346/files/apple_iphone_8_specs.pdf
    • https://cdn.shopify.com/s/files/1/0439/6145/0654/files/igcse_additional_mathematics_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/office_attendance_format_in_excel.pdf
    • https://cdn.shopify.com/s/files/1/0432/3462/3643/files/79425870982.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_off000064b1.bin
28ac32f24184e5a9b40151432c60ea3e3223b3bcad073eb38d91e9adc7c3de2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x64B1 4988 bytes
font_01_sfnt_off000075c2.bin
9ec31be4cfe7797d58f46245b0d04ae79f550fce7c1186e1508e76964f1a0fdc
pdf-font-stream PDF embedded font (sfnt) at offset 0x75C2 10708 bytes