Malicious PDF — malware analysis report

Static analysis result for SHA-256 26ecbf0d5d2c771c…

MALICIOUS

PDF

55.2 KB Created: 2020-08-24 18:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 989a424166333b385a04948e36c430f3 SHA-1: 367585e035b987deffde2bb5894dbc1d643366aa SHA-256: 26ecbf0d5d2c771cb083a011577b8e3a3317d77682ef62cc75c379e1e44d4c9f
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 pointing to 'https://ttraff.com/pify?keyword=internal+audit+group+reports'. This indicates a phishing or social engineering attempt to redirect the user to a malicious site. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning or to obscure the final malicious destination.

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.com/pify?keyword=internal+audit+group+reports
    • http://files.tylerhomesnj.net/uploads/1/3/1/4/131484133/ae40232.pdf
    • https://cdn.shopify.com/s/files/1/0428/5795/5494/files/wiveguzenefixav.pdf
    • https://cdn.shopify.com/s/files/1/0431/6119/0554/files/31427504413.pdf
    • https://cdn.shopify.com/s/files/1/0432/4206/1986/files/hdfc_mutual_fund_change_of_nomination_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/fevimewojimepirevamokuk.pdf
    • https://cdn.shopify.com/s/files/1/0464/6089/5384/files/consumer_reports_apple_watch_3.pdf
    • https://cdn.shopify.com/s/files/1/0432/4261/9035/files/27597320179.pdf
    • https://cdn.shopify.com/s/files/1/0431/0928/6042/files/nipodanafivoberi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0102/7493/files/zeborutapifixe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2666/1023/files/xevipunesup.pdf
    • https://cdn.shopify.com/s/files/1/0433/4986/8703/files/38532612786.pdf
    • https://cdn.shopify.com/s/files/1/0452/5621/2642/files/statism_and_anarchy.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_off00008dd1.bin
3a336797b1275f6067d06c6c2c1f31314311c87273c74618b23124d88592334e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD1 4948 bytes
font_01_sfnt_off00009e9e.bin
1fed6fc78aee5ba6cf2a2ef9583da8be752ccfeb0be66062bd719c03821304bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E9E 10176 bytes
font_02_sfnt_off0000c17c.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC17C 4324 bytes

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