Malicious PDF — malware analysis report

Static analysis result for SHA-256 c42a5327f34a91da…

MALICIOUS

PDF

45.4 KB Created: 2020-08-19 07:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0c952d79dd4a2b27902da9286668888 SHA-1: 9824e198beb3b9de2cf7391decb78091cb40acc8 SHA-256: c42a5327f34a91dab620c2a77a7634731c90fff91f895eb4e08038756aaae2c7
128 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a link farm pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=ajax+form+submit+success+error', which is flagged as malicious. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=ajax+form+submit+success+error
    • http://mazumo.llabands.com/uploads/1/3/0/8/130813747/topebinatake.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/assembly_language_programming_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0436/2865/8848/files/fedonamosopu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5757/7122/files/jofesalafewunonipotide.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/41517754230.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/xatogelavefuwilixovi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/8262132220.pdf
    • https://cdn.shopify.com/s/files/1/0437/3613/7882/files/don_t_starve_krampus.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9074/files/gukadivanufibidof.pdf
    • https://cdn.shopify.com/s/files/1/0429/5580/0739/files/77620519633.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_off00006904.bin
311e84ab5f562ef5a6cff49faf8e1affc08965ef83dbaaeeaa8be8f681f275ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6904 5268 bytes
font_01_sfnt_off00007ae5.bin
11ae0be9b275baef870a6d792a5971a6d4fba8f377fbe647fb21b85d6f253dda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE5 14764 bytes

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