Malicious PDF — malware analysis report

Static analysis result for SHA-256 8df3bb51c3d1cbec…

MALICIOUS

PDF

68.1 KB Created: 2020-07-31 04:04:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63cad1722a27a5c45e419da7355713e4 SHA-1: 47b43ebdcd9c1fc22a67fe52593e6308a992a486 SHA-256: 8df3bb51c3d1cbec5234b7d4494c91d4b4c734dfc2fa1057f2ee91d206217f13
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.ru/pify?keyword=adenosine+mechanism+of+action+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDFs from web content. The combination of a link farm and a malicious redirector indicates an attempt to drive traffic to harmful sites, likely for phishing or malware distribution.

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.ru/pify?keyword=adenosine+mechanism+of+action+pdf
    • http://files.slsfnc.com/uploads/1/3/1/3/131379740/9295056.pdf
    • http://files.nadiamatar.com/uploads/1/3/1/8/131857199/pelimozuza_gigezodoku_vuzimemotu_navaxoxaviji.pdf
    • http://files.pittelwilkinson.com/uploads/1/3/1/4/131437599/9010779.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3302/files/puximoxigojigawuxozugogo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9318/7989/files/67846517522.pdf
    • https://cdn.shopify.com/s/files/1/0429/4007/2092/files/pefegidefipakerekan.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/20245203766.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinubigelezegir.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3399/files/56380905774.pdf
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/28983128779.pdf
    • https://cdn.shopify.com/s/files/1/0431/7400/2837/files/tonejalevuzofilanironozu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35031547028.pdf
    • https://cdn.shopify.com/s/files/1/0430/4276/7001/files/37056168531.pdf
    • https://cdn.shopify.com/s/files/1/0431/6689/2186/files/xetovuropixe.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/49365316851.pdf
    • https://cdn.shopify.com/s/files/1/0437/3810/3962/files/93899007974.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/
    • https://cdn.shopify.com/s/files/1/0428/9835/843

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0dc.bin
7d9bf6130d24e6abd3b1dafd4b46156ff2cb20f3463dffc46e09c99441d1b211
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0DC 5044 bytes
font_01_sfnt_off0000c1d1.bin
e7a2e5358a90db969ef1cb818feb8fa6d67522f8afe2e83ba4756b9b08bcb39d
pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D1 13380 bytes
font_02_sfnt_off0000ed76.bin
f80b9f84d6ea16074f67da7a904ab41e14e5a44612b81a97f195d72f9bd2a496
pdf-font-stream PDF embedded font (sfnt) at offset 0xED76 16160 bytes