Malicious PDF — malware analysis report

Static analysis result for SHA-256 5894bc2d62f88854…

MALICIOUS

PDF

41.9 KB Created: 2020-08-06 15:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0b8e4913ac39b2d44f6d82ea757e89e SHA-1: 3e925656f525b82d2278d80db189a9d7155444ab SHA-256: 5894bc2d62f88854601df2a928541f4c326cf3cf4e5aa78080e356ed6d18f752
128 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a 'shortlisted candidate' and a URL that appears to be a lure. The primary malicious URL identified is https://ttraff.com/pify?keyword=cdfipb+shortlisted+candidate+2020+pdf, which likely leads to further malicious content. Another heuristic identified a link farm of PDF files hosted on cdn.shopify.com, with the first URL being https://cdn.shopify.com/s/files/1/0428/1185/0918/files/rivotezaxorizolurem.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.com/pify?keyword=cdfipb+shortlisted+candidate+2020+pdf
    • http://files.markbeasley.net/uploads/1/3/1/4/131407539/5c17b4.pdf
    • http://files.twohandsrescue.org/uploads/1/3/1/4/131406258/f675790.pdf
    • http://files.mountainairdance.com/uploads/1/3/1/3/131382078/fe694ad8.pdf
    • http://files.coopercatgallery.com/uploads/1/3/0/7/130739962/4754771.pdf
    • https://cdn.shopify.com/s/files/1/0428/1185/0918/files/rivotezaxorizolurem.pdf
    • https://cdn.shopify.com/s/files/1/0431/9733/3664/files/21781607978.pdf
    • https://cdn.shopify.com/s/files/1/0428/5032/0540/files/39877047486.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54171278856.pdf
    • https://cdn.shopify.com/s/files/1/0433/7880/2846/files/gopotezivebolan.pdf
    • https://cdn.shopify.com/s/files/1/0433/2896/2715/files/81499812485.pdf
    • https://cdn.shopify.com/s/files/1/0437/8879/6065/files/41050364664.pdf
    • https://cdn.shopify.com/s/files/1/0434/8647/8489/files/tangled_i_see_the_light_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0436/8554/4089/files/tovixikufunenogefo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6292/7263/files/474475553.pdf
    • https://cdn.shopify.com/s/files/1/0435/0817/0918/files/53728591750.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_off00006543.bin
e41ea5203af4067417d92b47b322652d611a3609fc85b2bb373c552c7db95a2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6543 5560 bytes
font_01_sfnt_off00007819.bin
69019cbd6d2a8a8bfa2e85dbbeb5d16bb4917599656258b59af4fd479d1bc15d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7819 10252 bytes