Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e1e49c3619688c0…

MALICIOUS

PDF

42.2 KB Created: 2020-08-05 01:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57d5ed2cf019cf177f404797d449eecf SHA-1: 777476a0c760fb3ae5b1e5a3df6bc9d759bde6e0 SHA-256: 4e1e49c3619688c09a60209766f72de15cd8f808a63645474dd0c9fea1f2eedf
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to PDF barcode generation and the redirector URL, indicating a lure to a malicious site. No scripts were extracted, but the PDF structure and link farm heuristic strongly suggest a malicious redirection attempt.

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=generate+pdf417+barcode+android
    • http://files.backnbalance.org/uploads/1/3/0/8/130814172/8432241.pdf
    • http://files.simplyessentiallife.com/uploads/1/3/1/4/131483108/6883a2d398516.pdf
    • http://files.tweedvalleyhapkido.com/uploads/1/3/2/6/132680932/340830.pdf
    • https://cdn.shopify.com/s/files/1/0431/5178/6135/files/69472129643.pdf
    • https://cdn.shopify.com/s/files/1/0436/0224/7838/files/18728440619.pdf
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/towuxegawozamapudaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/2909/3784/files/4532435798.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/3362803533.pdf
    • https://cdn.shopify.com/s/files/1/0431/6259/9586/files/kotisupubizud.pdf
    • https://cdn.shopify.com/s/files/1/0434/0888/3870/files/vuwoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/94582740508.pdf
    • https://cdn.shopify.com/s/files/1/0430/7533/8389/files/lesorawupu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/puvexe.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_off00005ad3.bin
fbd61523d07691c7f6fe2d5b59b279258f11c81af0c14d31b22197b985048460		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD3 5120 bytes
font_01_sfnt_off00006c52.bin
76ec6be8c7b9e460c36c153ec2d6c9dc15c2285e76695434ae8129adeeeb84f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C52 9940 bytes
font_02_sfnt_off00008e56.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E56 4324 bytes

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