Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2e3f6473d904f8a…

MALICIOUS

PDF

39.8 KB Created: 2020-08-17 01:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86e25d7e43ff12a0e38768f2cb9b7d25 SHA-1: 002f1d6e199adfa45bac65ec439c701f6fc9d0b2 SHA-256: b2e3f6473d904f8a2e00dbeb265af962c23d02b67d84958029603a05bc89842a
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to a redirector service. The primary malicious URL identified is https://ttraff.com/pify?keyword=letter+c+worksheets+free, which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, also contains this URL, reinforcing the lure. No scripts were extracted, but the PDF structure itself is used for the malicious redirection.

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=letter+c+worksheets+free
    • http://zodamuguf.hermanalongmore.com/uploads/1/3/1/3/131383314/duxewixuzasume.pdf
    • http://files.fencer.ca/uploads/1/3/1/6/131607063/ffb2982f147a.pdf
    • http://pufopig.moriahellamason.com/uploads/1/3/1/4/131438759/d86ee9a8a6eb05e.pdf
    • http://files.dan-ebert.com/uploads/1/3/2/6/132683251/davasibobe-wanamudixe-zadowode.pdf
    • http://modox.topicalbiblestudylessons.com/uploads/1/3/0/9/130969723/nubupeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/70231427808.pdf
    • https://cdn.shopify.com/s/files/1/0430/9316/4199/files/absorbancia_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/vukerakuriduzugamamuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/4721/4486/files/68954907131.pdf
    • https://cdn.shopify.com/s/files/1/0437/4603/3818/files/46473193509.pdf
    • https://cdn.shopify.com/s/files/1/0430/5816/7959/files/43122927625.pdf
    • https://cdn.shopify.com/s/files/1/0433/7762/3201/files/zajigofijogabeledemi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3561/files/blacksmith_vanilla_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/5339/7654/files/15836594690.pdf
    • https://cdn.shopify.com/s/files/1/0432/2168/0283/files/wumivemaxexalujewugisozu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7868/0730/files/85845658332.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_off00005f5d.bin
116b62b8931ca9183fcb9a83ffd867e1a654a7fd7ef6bfa7a033904c8bc19281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5D 4824 bytes
font_01_sfnt_off00006fd7.bin
ecdeccf8a493aa4330159a9bfaedcd352132eb7268555bfba0ba3bb1763fe854		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD7 10084 bytes

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