Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd51547fce4fc33b…

MALICIOUS

PDF

48.3 KB Created: 2020-07-31 06:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b07002af538d2251870a46f4d2c99f4a SHA-1: 1917cc361b2227fd3120a1319246ceeb17cec85e SHA-256: bd51547fce4fc33bc607b55742797a4c2e4aa4481afe1cb216854ca3acb6d59a
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, appears to contain keywords related to rental agreements, suggesting a lure for users seeking such documents. The presence of numerous external links, many hosted on 'cdn.shopify.com', indicates a link farm designed to obscure the ultimate destination and potentially spread malicious content.

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=b%25C3%25BCrgschaft+mietvertrag+muster+pdf
    • http://files.garettsguidance.com/uploads/1/3/1/0/131071072/liwajexikapak_nuluzafiwa_nunug_sakerofegaboza.pdf
    • http://files.rollepodiatry.co.uk/uploads/1/3/1/6/131637631/kewudijotu_pagerozejaxuwes.pdf
    • http://files.ctocps.com/uploads/1/3/0/7/130738484/915bd51d73bd54.pdf
    • http://files.globallearning-cuba.com/uploads/1/3/2/8/132814136/zusedul-feviruxiv-piliputuna-tapukig.pdf
    • http://files.idancechicago.org/uploads/1/3/1/8/131856331/zupobokisedefe.pdf
    • https://cdn.shopify.com/s/files/1/0435/4303/6053/files/tevapovorep.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/14230176788.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/32654231760.pdf
    • https://cdn.shopify.com/s/files/1/0430/1658/5379/files/nureremadesa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3565/5335/files/87621892214.pdf
    • https://cdn.shopify.com/s/files/1/0429/2768/5799/files/vigonosomuginajitivixup.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/26624053367.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41841620016.pdf
    • https://cdn.shopify.com/s/files/1/0437/0720/3739/files/49459934171.pdf
    • https://cdn.shopify.com/s/files/1/0429/9377/8837/files/zopetunukejurazuriliju.pdf
    • https://cdn.shopify.com/s/files/1/0435/8501/1871/files/pomozimekogabifalobod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voxetevew.pdf
    • https://cdn.shopify.com/s/files/1/0435/2416/1695/files/jezuvire.pdf
    • https://cdn.shopify.com/s/files/1/0433/7755/7660/files/jokonoruvivowozivokapani.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_off00007bc4.bin
4fceaa19d1a5410bd69a4eb3b3c527991953c44c873f72d04ffa453f39018cba
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC4 5432 bytes
font_01_sfnt_off00008e16.bin
a953bc108e4618e926a0a73e698d87e5e1cde42fd34d189eb13668d284826e4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E16 10880 bytes