Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ca5e50c9cb49215…

MALICIOUS

PDF

41.9 KB Created: 2020-08-05 16:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94f3778fb82d9db3103b5e157f956301 SHA-1: bbe24b2ed10ddd198b70ef3bc1649bc99e5b2df5 SHA-256: 4ca5e50c9cb492155a3a6d75c7b9f12af658b6761907e1998c787773f2b2cc3d
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, with one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'web application development tools', likely a lure. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content broadly. The primary malicious IOC is the redirector URL.

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=web+application+development+tools+pdf
    • http://files.jebmotley.com/uploads/1/3/1/3/131379899/turevumo_samojofi_zexabi.pdf
    • http://files.twilightrosemusic.com/uploads/1/3/2/7/132710763/1246326.pdf
    • http://files.simonecasey.com/uploads/1/3/1/4/131455832/dcbf346fb.pdf
    • http://files.schoolpatio.com/uploads/1/3/2/7/132740415/6232202.pdf
    • http://files.twilightrosemusic.com/uplo
    • https://cdn.shopify.com/s/files/1/0428/7404/4579/files/scholarship_essay_examples_financial_need.pdf
    • https://cdn.shopify.com/s/files/1/0431/1613/4562/files/tilikikenafatamorewigur.pdf
    • https://cdn.shopify.com/s/files/1/0435/4162/7029/files/romarivujave.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fedixudarat.pdf
    • https://cdn.shopify.com/s/files/1/0436/3943/9510/files/70647340844.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/telisupuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/5464/5916/files/curious_researcher.pdf
    • https://cdn.shopify.com/s/files/1/0430/9296/7581/files/95843081995.pdf
    • https://cdn.shopify.com/s/files/1/0433/7755/7660/files/28599441705.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/12041581360.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_off00006653.bin
ead7bd9d24bca091034873caf7f862e58560f99fa9dc8920eac75babffc78e60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6653 5420 bytes
font_01_sfnt_off000078c3.bin
d9ec3dd7e357086f68de4b10a1f8f16db2f416ffeb9bd205f1449bea4b31c583		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C3 9852 bytes

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