Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a49e0d9316de279…

MALICIOUS

PDF

33.9 KB Created: 2020-08-23 02:22:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e33b695503c87d45b93a368a0acd935 SHA-1: 45468f8424936314f45114175775affa54b98bae SHA-256: 1a49e0d9316de2799479226c7c8872bd59001614aa09a29074a9f098cd55f954
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URL points to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious content. The presence of numerous links to external PDFs, many hosted on Shopify, suggests an attempt to manipulate search engine results or distribute further malicious content. 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=doberman+images+free
    • http://pekene.electricscooterrentalorlando.com/uploads/1/3/0/8/130874063/6330756.pdf
    • http://files.tetonxc.com/uploads/1/3/1/4/131437930/morikovo.pdf
    • http://files.rustyhenrichsen.com/uploads/1/3/1/8/131871462/1526458.pdf
    • https://cdn.shopify.com/s/files/1/0454/2604/9182/files/jeferumodijopurudovojozot.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/kiweliziwukesisezazufi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93515438816.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6480/files/temimipamaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/7614/8643/files/payroll_accounting_2015.pdf
    • https://cdn.shopify.com/s/files/1/0432/8318/5832/files/wonikakazaxaxavoko.pdf
    • https://cdn.shopify.com/s/files/1/0459/7140/7008/files/avast_security_pro_mac.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kivamusefelozadadazub.pdf
    • https://cdn.shopify.com/s/files/1/0431/5542/3398/files/auma_sar_actuator_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0433/6910/3528/files/43358598860.pdf
    • https://cdn.shopify.com/s/files/1/0438/4194/5760/files/28544355792.pdf
    • https://cdn.shopify.com/s/files/1/0446/1743/3251/files/how_to_deploy_to_heroku_from_github.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4900/files/masker_innisfree_sheet_mask_untuk_jerawat.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_off000047f7.bin
4ab93eb01f9c0f979092d95ae3935b0fa3f0fc4aa96cdb4fa3330f49b886075b
pdf-font-stream PDF embedded font (sfnt) at offset 0x47F7 5192 bytes
font_01_sfnt_off00005988.bin
cf6d3654c21a0862547cf0b0580115330a87b6c30a04251c509eaaed2bccb4a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5988 9796 bytes