Malicious PDF — malware analysis report

Static analysis result for SHA-256 501598c0a7b7df71…

MALICIOUS

PDF

39.9 KB Created: 2020-08-07 22:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9de3e58219876a116dbe569bb29cba02 SHA-1: 8ac6e19d2fa68a175bd1558a1f5c30236c3b8df1 SHA-256: 501598c0a7b7df71da32b4fb029dbaad32532f08be2d5e47c255f528a219cd52
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The document also exhibits characteristics of a link farm, with numerous external PDF links. The primary malicious URL identified is https://ttraff.cc/wb?keyword=chiller%20troubleshooting%20pdf, which is likely intended to redirect the user to a malicious site. No scripts were extracted from this sample.

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.cc/wb?keyword=chiller%20troubleshooting%20pdf
    • http://files.onyxfuneralplanning.com/uploads/1/3/1/3/131380413/pofadajigivep.pdf
    • http://lukemawo.palutabulations.com/uploads/1/3/1/0/131071164/cb87eb0d06b27.pdf
    • http://files.treehousehashomes.com/uploads/1/3/2/3/132303374/mekuwuzanuz_bevozupimip_kemoxezagubova_tedadosusep.pdf
    • https://cdn.shopify.com/s/files/1/0434/5485/7369/files/mibapakarugi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8104/0033/files/buzavolabubuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/9038/5821/files/negorisowebow.pdf
    • https://cdn.shopify.com/s/files/1/0431/3029/0327/files/loboberesowalopid.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/pulizowelokobozubawiz.pdf
    • https://cdn.shopify.com/s/files/1/0427/9658/1020/files/91573961726.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2117/files/zozumagawamubusodupaworix.pdf
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/sozixumulavurazizu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2394/9224/files/7902405498.pdf
    • https://cdn.shopify.com/s/files/1/0432/8108/8670/files/dewonez.pdf
    • https://cdn.shopify.com/s/files/1/0431/5535/7852/files/82356333295.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1703/files/34893763875.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_off00005e1b.bin
fc33f76eda7825b5a780a10187fe1b9967bd100d9804f115d2f9605a75321fec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1B 5140 bytes
font_01_sfnt_off00006f82.bin
46cf9c9c8ac5119dcbc786949f465d74cea7b99d26a9a7f9a1effa3b21d0e08d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F82 10444 bytes

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