Malicious PDF — malware analysis report

Static analysis result for SHA-256 db0ccc6c8b690bd4…

MALICIOUS

PDF

46.6 KB Created: 2020-07-30 05:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71feb9f81b977285391326c6dc15efe5 SHA-1: 739359134a8fcb16beccc5bc0949de104371eb0b SHA-256: db0ccc6c8b690bd49a346324047e32dfbea0d6f7824af8f67ce62bae51356838
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a link farm, designed to redirect users to external websites. One of these links, 'https://ttraff.cc/pify?keyword=anemia+workup+pdf', points to a known malicious redirector. The document body is heavily obfuscated and appears to be junk data, suggesting the primary malicious function is the distribution of links.

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.cc/pify?keyword=anemia+workup+pdf
    • http://files.imagesbya2zphotography.com/uploads/1/3/1/4/131438329/sorulorenupixa_guriwap.pdf
    • http://files.emilyafield.com/uploads/1/3/1/8/131856076/8771918.pdf
    • http://files.bronzeleonleonbergers.com/uploads/1/3/2/6/132682327/3502883.pdf
    • http://files.sitatyourperilchairs.com/uploads/1/3/2/3/132302963/5970551.pdf
    • http://files.tlakelabs.com/uploads/1/3/0/9/130969974/5212183.pdf
    • https://cdn.shopify.com/s/files/1/0427/9857/9879/files/tuxemopupumukogenu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5644/8156/files/49409958961.pdf
    • https://cdn.shopify.com/s/files/1/0431/1040/0153/files/kapadi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/roxapuxa.pdf
    • https://cdn.shopify.com/s/files/1/0436/9183/5545/files/xelavodibubanuxiralifan.pdf
    • https://cdn.shopify.com/s/files/1/0432/5978/9472/files/87977777622.pdf
    • https://cdn.shopify.com/s/files/1/0437/1116/8664/files/85714510000.pdf
    • https://cdn.shopify.com/s/files/1/0435/6843/1265/files/35999454318.pdf
    • https://cdn.shopify.com/s/files/1/0433/6225/5013/files/48346761208.pdf
    • https://cdn.shopify.com/s/files/1/0435/2265/4362/files/90018304024.pdf
    • https://cdn.shopify.com/s/files/1/0434/2690/6264/files/95470886976.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_off00007a7b.bin
5f7d32b3ae6062ab05a3347139d8a327facd1bd02780172644213902dba3877a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7B 4924 bytes
font_01_sfnt_off00008b28.bin
5e108d3d6f6a7a98670ccc15d39fd724ec76d1b47851702a51e26bc59d9cb871		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B28 10192 bytes

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