Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad7d840912d250d…

MALICIOUS

PDF

65.8 KB Created: 2020-08-04 15:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61564e9e757bdd481859b04b5802e9b0 SHA-1: 39553c6fb155fb612a75aff52e119f2d16db20c3 SHA-256: 8ad7d840912d250dd6f0d7991e7a86f219e246dd20d51298d2de72a9c57ac4dc
120 Risk Score

Malware Insights

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

The PDF file contains a link farm and a direct link to a redirector URL, indicating a phishing or malicious redirection attempt. The document body, though heavily obfuscated, contains the target URL. The heuristic firings confirm the presence of a malicious redirector link and a link farm within the PDF. 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.cc/pify?keyword=neoliberalismo+breve+historia+del+infierno+pdf
    • http://files.tamrisfarmnubians.com/uploads/1/3/0/9/130969129/6980725.pdf
    • http://files.dmcicondosales.com/uploads/1/3/0/8/130873781/jowanodikamewotal.pdf
    • http://files.popculturehoard.com/uploads/1/3/0/7/130776619/letamewef.pdf
    • http://files.communitychoice.us/uploads/1/3/1/4/131409090/efa02.pdf
    • https://cdn.shopify.com/s/files/1/0434/9178/6918/files/46821037343.pdf
    • https://cdn.shopify.com/s/files/1/0434/0419/8044/files/34942511398.pdf
    • https://cdn.shopify.com/s/files/1/0436/7073/2950/files/14556387420.pdf
    • https://cdn.shopify.com/s/files/1/0434/9696/4261/files/5902324548.pdf
    • https://cdn.shopify.com/s/files/1/0432/8692/1376/files/grapeapplesauce_texture_pack.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/bonubixisoguxezex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sarexomerowomowubufo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0449/3987/files/62494437691.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1585/files/22841580167.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37237973095.pdf
    • https://cdn.shopify.com/s/files/1/0434/3028/1377/files/zosakojamawisubazaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/4990/0439/files/b1_english_test.pdf
    • https://cdn.shopify.com/s/files/1/0429/9590/8761/files/miper.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63545483179.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_off0000bdd5.bin
1f9eb867242fa2af55ce6bbb8833dd0bc83705acc96678c18a2d0d604385e61e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD5 5448 bytes
font_01_sfnt_off0000d036.bin
0e1b929c8ec40371dc8f8d12be82129e73e501cd5501472d13f4921d83b68d93		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD036 12256 bytes

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