Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aa8e78cbf868418…

MALICIOUS

PDF

36.0 KB Created: 2020-08-15 06:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b160f6de72bf0fc5ff598e9a400d53c1 SHA-1: 0a3a80e268ce1350204ebbd3c74f2fd38cab2ea7 SHA-256: 3aa8e78cbf868418fadb5f07ca3401d1d943f5ed4ed8271e022fc0cebd7fb493
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as a free converter. The document body and embedded links are part of a link farm designed to attract search engine traffic. The primary malicious action is redirecting the user to the malicious URL, which likely leads to further compromise.

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/pify?keyword=converter+pdf+em+jpg+online+gratis+portugues
    • http://files.nicholaspaulmccarty.com/uploads/1/3/0/9/130969761/webeg_xejarebutalow_xagixi_wokidito.pdf
    • http://files.spiritualbirthing.com/uploads/1/3/1/6/131606393/xulotiwelogorofiveze.pdf
    • http://dudavaze.tcfallnationals.com/uploads/1/3/2/3/132302780/finakulekipana.pdf
    • https://cdn.shopify.com/s/files/1/0437/9138/4736/files/74139076931.pdf
    • https://cdn.shopify.com/s/files/1/0429/6392/7203/files/37151066482.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/momox.pdf
    • https://cdn.shopify.com/s/files/1/0439/2304/6568/files/content_marketing_journal.pdf
    • https://cdn.shopify.com/s/files/1/0437/6766/0706/files/69798062893.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5965/files/fonanodazevuwozowixonilaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9017/files/41927594762.pdf
    • https://cdn.shopify.com/s/files/1/0432/7807/4022/files/carer_s_allowance_claim_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/6461/4303/files/42638794243.pdf
    • https://cdn.shopify.com/s/files/1/0428/8364/5599/files/60162029597.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7831/files/50921524959.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_off00004d7a.bin
a29b707930968d76ea478b2a1e5c934b90d911e9727629fa7bac292c10e64af6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D7A 5404 bytes
font_01_sfnt_off00005fd5.bin
2058167a87107feff6b5457b20288411211a26a5b234398b4d0c57a63ba75fcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD5 10272 bytes

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