Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0575f9602d5223f…

MALICIOUS

PDF

50.2 KB Created: 2020-08-13 21:35:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca9e1a433f3b47fe45ac939cb370cb5b SHA-1: c7f32c451759fc122c84198f5941ce863cfb3ebe SHA-256: d0575f9602d5223f1f17595fa3a1cf894a3c110ccf93e0f532724df1255f2644
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is further supported by the presence of a large number of external PDF links, suggesting a link farm. The document body contains a call-to-action phrase, indicating a social engineering lure. The primary malicious IOC is the redirector URL, which likely leads to further stages of the attack.

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=application+for+additional+documents+format
    • http://files.bordasmusic.com/uploads/1/3/2/6/132683330/zowokenosiw.pdf
    • http://files.bcmeccanomodellers.com/uploads/1/3/1/4/131406473/tejipamiri.pdf
    • http://files.sidleystandup.com/uploads/1/3/0/7/130775942/3089407.pdf
    • http://files.beautybyellav.com/uploads/1/3/1/4/131437683/4896078.pdf
    • http://files.writerjessicaleigh.com/uploads/1/3/1/4/131407278/9598690aa5d4f.pdf
    • https://cdn.shopify.com/s/files/1/0436/7345/2697/files/96087733635.pdf
    • https://cdn.shopify.com/s/files/1/0430/6000/2967/files/arrow_stage_lines.pdf
    • https://cdn.shopify.com/s/files/1/0429/1916/6119/files/31448505602.pdf
    • https://cdn.shopify.com/s/files/1/0434/7923/6774/files/luzisavaro.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7779/files/silizesonavetudepi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3584/files/sozenijufekolanuvopa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9213/2508/files/74271151668.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gijamibumiji.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0811/files/7724250862.pdf
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/79948635092.pdf
    • https://cdn.shopify.com/s/files/1/0449/4727/5931/files/mahabharata_full_story_english.pdf
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/kriteria_sepsis_neonatorum.pdf
    • https://cdn.shopify.com/s/files/1/0434/4404/3943/files/lulopelapobixive.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_off00008198.bin
116a92e9ec03fe247d5009c848fec5f460198e506c7818783f0169c1c87dc375
pdf-font-stream PDF embedded font (sfnt) at offset 0x8198 5288 bytes
font_01_sfnt_off0000936d.bin
3fbaccda6c4685682d2dd7daf1cb503f18eec8bd4df1aff5caf751e3b9ffb632
pdf-font-stream PDF embedded font (sfnt) at offset 0x936D 11112 bytes