Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab16db43e68b3c4e…

MALICIOUS

PDF

51.4 KB Created: 2020-08-04 02:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac23f8fd4b3b1212820b4d32e32e4450 SHA-1: f50113a72d2152544ae227a8bce501969a5001d7 SHA-256: ab16db43e68b3c4e8200a2f4f69b71dbee43e6e013a2a34edd83231ef386b2df
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=dictation+in+english+for+beginners+pdf, which is likely used to funnel victims to a phishing or malware site. Another heuristic identified a large number of external PDF links, suggesting a link farm or SEO poisoning attempt, with https://cdn.shopify.com/s/files/1/0428/5736/5670/files/remote_function_roblox.pdf being the first in this list. The document body contains garbled text but also includes the primary malicious URL and several benign-looking Shopify URLs.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=dictation+in+english+for+beginners+pdf
    • http://files.engineeringonashoestring.com/uploads/1/3/1/4/131454620/pebazavafabeluv.pdf
    • http://files.blueheronsynergy.com/uploads/1/3/0/7/130738803/kojexal_xezax_xaxovipotirezuv.pdf
    • http://files.markbruntonphotography.com/uploads/1/3/0/7/130738892/90edb070a623.pdf
    • http://files.dragonflydayhomes.ca/uploads/1/3/0/7/130775503/162137.pdf
    • http://files.minilivestock.com/uploads/1/3/2/7/132740415/38a223c.pdf
    • https://cdn.shopify.com/s/files/1/0428/5736/5670/files/remote_function_roblox.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2548/files/motusavemixipevavasipevef.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/xabunokevegizuvudaburimi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/medarovadujagowurevasote.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20745245188.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/wetuzozomamalezunuxibofat.pdf
    • https://cdn.shopify.com/s/files/1/0437/5855/1189/files/wopifopeduxev.pdf
    • https://cdn.shopify.com/s/files/1/0430/2091/0746/files/busegopuzaxewimimodiresi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8882/8829/files/netflix_forensic_files.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2122/files/suxiwalivelin.pdf
    • https://cdn.shopify.com/s/files/1/0431/1462/7234/files/wujajutesepagaxun.pdf
    • https://cdn.shopify.com/s/files/1/0435/2363/7402/files/davawenolewapof.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_off00008940.bin
9bd63324926117ea4d700e0fa6eb59833767ab240f893008b29d4ec774e733e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8940 5556 bytes
font_01_sfnt_off00009c1e.bin
b3eece7f9992dc2ab5302712204614fa5dcd893afc6f113a9da643fbbfd2a049
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C1E 10608 bytes