Malicious PDF — malware analysis report

Static analysis result for SHA-256 2983b8b80dd97b89…

MALICIOUS

PDF

51.0 KB Created: 2020-08-13 04:23:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2bd4990beae289892412df1f638dc08 SHA-1: 03d67515cbda01bb3ad7ebe386520773c23df5a4 SHA-256: 2983b8b80dd97b89748edec391325361ca080383a1f52dfeba679315ba883dca
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, includes the URL 'https://ttraff.com/pify?keyword=sum+and+product+of+roots+of+cubic+equation+pdf', which is flagged as malicious. The presence of a mass external PDF link farm further indicates a malicious intent to distribute content through potentially compromised or controlled sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=sum+and+product+of+roots+of+cubic+equation+pdf
    • http://lamumobu.uplyftelectronics.com/uploads/1/3/0/9/130969352/9953017.pdf
    • http://vilora.theblackpoolplayroom.com/uploads/1/3/2/6/132682883/wejaxibuvuna-wodexefeg.pdf
    • http://files.356sog.org/uploads/1/3/1/0/131070525/54195.pdf
    • https://cdn.shopify.com/s/files/1/0430/4266/8698/files/chuyn_i_file_sang_file_nh_trc_tuyn.pdf
    • https://cdn.shopify.com/s/files/1/0428/9862/0569/files/vapifet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sarozasupevukofapunaxovu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7741/8651/files/20_standard_amino_acids.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/nexus_5x_roms.pdf
    • https://cdn.shopify.com/s/files/1/0428/4848/5535/files/51476182911.pdf
    • https://cdn.shopify.com/s/files/1/0433/1952/5534/files/allen_carr_stop_drinking_now.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/51913287212.pdf
    • https://cdn.shopify.com/s/files/1/0432/9144/3364/files/aroma_rice_cooker_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24221046066.pdf
    • https://cdn.shopify.com/s/files/1/0427/5548/9948/files/rikijituwipebesizog.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006142.bin
49173830aab7840b678bfc374a48f1c14d6fb77471859480e665d625fe59cb19
pdf-font-stream PDF embedded font (sfnt) at offset 0x6142 5640 bytes
font_01_sfnt_off00007448.bin
b5abecdd0d2f9c5d530c5959fd13d789b2aeb3d3a2f08ebfe106c47e16783e3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7448 16168 bytes
font_02_sfnt_off0000a71f.bin
a8eb3faecff1e351d25dff83502dc9e36757d6806543c93e44900e5aa73561ba
pdf-font-stream PDF embedded font (sfnt) at offset 0xA71F 16152 bytes