Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4adf35df183f26b…

MALICIOUS

PDF

36.0 KB Created: 2020-08-18 22:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ee979a07fdbfbb5a43aa270b103deef SHA-1: c530b481b958776c2b9e328fd5a33ce43fd73fff SHA-256: a4adf35df183f26bb978d7ae418a5cd36fad6a78b55e9bfbd2468cad99689572
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.ru/pify?keyword=pink+panther+sheet+music+bass+clarinet', is designed to redirect users to malicious infrastructure. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs, many hosted on Shopify. The primary intent appears to be directing users to the malicious redirector.

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=pink+panther+sheet+music+bass+clarinet
    • http://files.bayareabiofeedback.net/uploads/1/3/1/4/131437845/jaxinawoxewinu_zibom_silafa.pdf
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/selenium_facebook_comment.pdf
    • https://cdn.shopify.com/s/files/1/0429/2083/7287/files/85363536134.pdf
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/accredited_tier_designer.pdf
    • https://cdn.shopify.com/s/files/1/0440/2629/8533/files/hayward_vari-_flo_xl_valve_parts.pdf
    • https://cdn.shopify.com/s/files/1/0445/9456/1188/files/intimacy_anorexia_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/4444/6118/files/85219113918.pdf
    • https://cdn.shopify.com/s/files/1/0434/2179/4460/files/9039286649.pdf
    • https://cdn.shopify.com/s/files/1/0436/4910/6080/files/38422561783.pdf
    • https://cdn.shopify.com/s/files/1/0431/5208/1053/files/10975862255.pdf
    • https://cdn.shopify.com/s/files/1/0429/2745/6419/files/17177010996.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_off00004283.bin
70ac714b23ab875afaec5c8f13eb61e3310269945dc9a05f40769a7d81d79910		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4283 5152 bytes
font_01_sfnt_off000053c3.bin
cfff04b2ae1f15ddf4a008bbd27105c6b001d2b03639215204e40ed1b8554fe8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53C3 9716 bytes
font_02_sfnt_off0000751b.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x751B 4324 bytes

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