Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4d704738bc4f6ea…

MALICIOUS

PDF

55.1 KB Created: 2020-08-21 21:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4e496dc84bcabf7862ef91fc879e56f SHA-1: de10a1aec6538b4627022773fc556cceadd67c10 SHA-256: b4d704738bc4f6ea637abbf87755610b6435895c76267eff7b0235fce33245b9
130 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). The document body, though heavily obfuscated, contains references to the malicious URL and appears to be a lure for a 'Twitter banner template photoshop'. The presence of a visual download button heuristic further supports a social engineering attack. The primary attack vector is likely a malicious redirector link embedded within the PDF.

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=twitter+banner+template+photoshop
    • http://mozoxeg.team-change.com/uploads/1/3/1/4/131412290/modegavimurufiruwun.pdf
    • http://files.creatingtolove.com/uploads/1/3/1/3/131383727/9ed88df.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/dafarijamikowoboja.pdf
    • https://cdn.shopify.com/s/files/1/0437/4737/7301/files/chaconne_bach_violin.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/fusodukibufoveziga.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/fefilore.pdf
    • https://cdn.shopify.com/s/files/1/0431/8678/2369/files/eloge_de_l_amour_alain_badiou.pdf
    • https://cdn.shopify.com/s/files/1/0434/4217/6150/files/kibikegamokolajezise.pdf
    • https://cdn.shopify.com/s/files/1/0439/1380/5992/files/nitro_to_word_converter_software_free_download_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0434/6406/5174/files/91901679720.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/96745258286.pdf
    • https://cdn.shopify.com/s/files/1/0438/0576/9889/files/44835956532.pdf
    • https://cdn.shopify.com/s/files/1/0434/5036/8152/files/zikukamijurafivama.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6295/files/phoenix_arms_hp22_problems.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50537202024.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/kigozuvemoxabafa.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_off0000999e.bin
841792c22e3b0763775c46119458fb63aa8c50c5741d79daab162e194ad8e0ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x999E 5240 bytes
font_01_sfnt_off0000ab43.bin
c90674db12bb319716c1699487b2e48a6df076e881671459375137276c58dff7
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB43 10540 bytes