Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4cf11553961d5ab…

MALICIOUS

PDF

44.3 KB Created: 2020-08-23 15:14:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ef274b180bb951130259cc54e574f0b SHA-1: 516e48f85f34929051edbf66d88bcd601ee33acf SHA-256: e4cf11553961d5aba8e9f999e884e4b15a64107ebf6ae5751243b42e93ace7db
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to traff.ru. The document body, though heavily obfuscated, contains the same URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains hosting PDF files. The primary malicious URL is likely intended to redirect the user to a phishing or malware distribution site.

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.ru/pify?keyword=sales+kit+template+powerpoint
    • http://wasen.graysandbluesofmontreal.com/uploads/1/3/0/7/130776485/tekafewurujana.pdf
    • http://subotu.catcaricature.studio/uploads/1/3/1/3/131398252/xurutizidumirebox.pdf
    • http://files.gancarzpainting.com/uploads/1/3/2/6/132695575/marugudiregox.pdf
    • http://rizurigiw.awarenessengineers.com/uploads/1/3/0/8/130873995/lewofosusanamorez.pdf
    • http://files.coloniachapel.org/uploads/1/3/1/4/131408364/1462354.pdf
    • https://cdn.shopify.com/s/files/1/0434/6393/4105/files/financial_markets_and_institutions_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/0342/0570/files/jabakojamofasijor.pdf
    • https://cdn.shopify.com/s/files/1/0434/5099/0753/files/63134445676.pdf
    • https://cdn.shopify.com/s/files/1/0432/2010/7424/files/4813127380.pdf
    • https://cdn.shopify.com/s/files/1/0435/3903/8360/files/43682605781.pdf
    • https://cdn.shopify.com/s/files/1/0434/5852/7397/files/76514762606.pdf
    • https://cdn.shopify.com/s/files/1/0435/1610/0776/files/bopimavis.pdf
    • https://cdn.shopify.com/s/files/1/0462/6995/6245/files/dr._ampoule_dual_mask_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/24046292733.pdf
    • https://cdn.shopify.com/s/files/1/0434/2113/9096/files/90285588426.pdf
    • https://cdn.shopify.com/s/files/1/0440/7223/9269/files/38622611687.pdf
    • https://cdn.shopify.com/s/files/1/0432/4042/3592/files/1797193745.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16175378270.pdf
    • https://cdn.shopify.com/s/files/1/0433/2843/8427/files/65959199255.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_off000064a8.bin
a23e1fc8623cc33686e320161b261513843246922135a73f9e43eab1d42e0f20
pdf-font-stream PDF embedded font (sfnt) at offset 0x64A8 3332 bytes
font_01_sfnt_off0000708f.bin
dfa3937c20c69ab318a1ab47946aeed0768adaf3a721497c872de7ddbadbd45d
pdf-font-stream PDF embedded font (sfnt) at offset 0x708F 5224 bytes
font_02_sfnt_off0000824b.bin
ee9686d0af821d9f49b5bad5ada6c7e3539b798467328c7d163230c6888a2b8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x824B 9796 bytes