Malicious PDF — malware analysis report

Static analysis result for SHA-256 d529490ea692d243…

MALICIOUS

PDF

47.0 KB Created: 2020-08-04 23:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59ab0aea435d0446852a5e3777619c22 SHA-1: 6c9170385bdb7f961274c1a6583f5f8d98f616f3 SHA-256: d529490ea692d24397023812480619cd00e10ee34e9a0f293583fa235f872025
120 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a link farm designed to obscure the ultimate destination. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.com'. The document body itself is heavily obfuscated but contains the same URL, suggesting the primary purpose is to lure the user into clicking through to a malicious site. No scripts were extracted from this sample.

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=a%25C3%25A7%25C3%25A3o+da+acetilcolina+pdf
    • http://files.mrsbingham.com/uploads/1/3/1/4/131438563/zupigobuwitevawiw.pdf
    • http://files.911bodyresq.com/uploads/1/3/0/7/130776118/natarudul-wasawebi-pifag-nisaneneduk.pdf
    • http://files.catherinesemenick.com/uploads/1/3/2/6/132695302/nekomemow.pdf
    • http://files.jasminkwan.com/uploads/1/3/1/4/131453248/kubomerebamel.pdf
    • http://files.yanktondomesticviolencecenter.com/uploads/1/3/2/6/132695714/mogomaga.pdf
    • https://cdn.shopify.com/s/files/1/0439/1088/9624/files/najigesisakimexitukasil.pdf
    • https://cdn.shopify.com/s/files/1/0436/8600/2838/files/jibuzegatokinepovowiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7097/files/59297722668.pdf
    • https://cdn.shopify.com/s/files/1/0427/9799/0055/files/82318941214.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/nebupevap.pdf
    • https://cdn.shopify.com/s/files/1/0431/2301/5841/files/autocad_2020_to_dwg_conversion.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/ruradegefi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7818/8198/files/77052819237.pdf
    • https://cdn.shopify.com/s/files/1/0428/1561/9239/files/96314141976.pdf
    • https://cdn.shopify.com/s/files/1/0439/9883/8942/files/20105494068.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_off00007665.bin
c0b6c1c122028f2261bf6249e840c7ec59c1317ec780f1c470c74665ea46417f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7665 5364 bytes
font_01_sfnt_off000087ee.bin
51a1ba6d1d9ef50c82871bb3d00f82b80a7c0243cf5c0165c6aca9ddacf268cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87EE 12372 bytes

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