Malicious PDF — malware analysis report

Static analysis result for SHA-256 899fcc5a76ba66af…

MALICIOUS

PDF

40.9 KB Created: 2020-08-07 03:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60d1e3a4dc452a7347e5070d3ff15c01 SHA-1: e398af32e05bb7989a4f31a9f7bd20e0410d09cf SHA-256: 899fcc5a76ba66af2e1c1828e1441e16f2a945c12e2a130fa54dbce7599a6b73
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a suspicious redirector URL (ttraff.cc). The document body is heavily obfuscated but appears to contain the same title as the redirector's keyword parameter, suggesting a SEO-based lure. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating an attempt to drive traffic to malicious infrastructure. No scripts were extracted from this sample.

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=aggregation+in+dbms+with+example+pdf
    • http://files.dannytropicals.com/uploads/1/3/2/8/132816091/900079.pdf
    • http://bixox.carriagehousepilatesandwellness.com/uploads/1/3/1/3/131383791/aaaa9a31.pdf
    • http://files.annbrodyguy.com/uploads/1/3/1/8/131871622/34bc83129.pdf
    • http://files.dissertationindia.org/uploads/1/3/1/3/131380440/feguzos.pdf
    • https://cdn.shopify.com/s/files/1/0437/0461/5066/files/58776870113.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4622/files/83532621971.pdf
    • https://cdn.shopify.com/s/files/1/0430/3175/6957/files/68154623536.pdf
    • https://cdn.shopify.com/s/files/1/0440/5483/9461/files/chandraprakash_assam_tet_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48177964882.pdf
    • https://cdn.shopify.com/s/files/1/0434/6766/9654/files/gexesawigibur.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/75099720770.pdf
    • https://cdn.shopify.com/s/files/1/0440/6693/0840/files/kazozigepikilarerelir.pdf
    • https://cdn.shopify.com/s/files/1/0430/3880/2073/files/pikuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/12498604991.pdf
    • https://cdn.shopify.com/s/files/1/0434/1248/8343/files/rujiwepazapupibiboduz.pdf
    • https://cdn.shopify.com/s/files/1/0430/2949/5959/files/82655583316.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/92884364380.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_off00005f23.bin
6edaca200e921aa40115201b0e50b7789b92216a94ce6b3b3c42e979becd327f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F23 5744 bytes
font_01_sfnt_off0000729b.bin
923b1ffd5274269cf9dca5f8d9c54774826d0c478fe9d88e50a0b80ffea676e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x729B 10448 bytes

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