Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f1b3e9961319aba…

MALICIOUS

PDF

48.8 KB Created: 2020-08-25 15:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14fb663714e1e1a518dccbdea05900da SHA-1: c92640674a53c60c920222da53b818f9934a8177 SHA-256: 4f1b3e9961319aba598df627c68ed2f9e59d4d418ad4c42d61e4a249c71f8827
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure for downloading 'jdk 1.8 for linux 32 bit', further supported by a heuristic for a visual download button. The primary malicious URL is https://ttraff.cc/pify?keyword=jdk+1.+8++for+linux+32+bit, which likely leads to the download of a secondary payload.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=jdk+1.+8++for+linux+32+bit
    • http://files.ajoyfulcreation1.com/uploads/1/3/0/7/130739472/vipisajekuwonoro.pdf
    • http://nadufewek.smilesandsymphonies.com/uploads/1/3/1/4/131437987/5863769.pdf
    • https://cdn.shopify.com/s/files/1/0429/9164/8929/files/jafosanobipiwon.pdf
    • https://cdn.shopify.com/s/files/1/0437/6562/9077/files/formcontrolname_validation_angular_2.pdf
    • https://cdn.shopify.com/s/files/1/0435/6718/6079/files/xifuvovajif.pdf
    • https://cdn.shopify.com/s/files/1/0433/9177/8965/files/tchibo_cafissimo_pure_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/5902059437.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3357/files/getesukuxoxutufesuv.pdf
    • https://cdn.shopify.com/s/files/1/0448/6466/7810/files/aachen_city_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/lisepop.pdf
    • https://cdn.shopify.com/s/files/1/0439/9199/0430/files/learn_to_write_arabic_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0431/3913/7702/files/riscos_biolgicos_no_ambiente_de_trabalho.pdf
    • https://cdn.shopify.com/s/files/1/0437/4659/0872/files/ipc_a_610.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_off00007f31.bin
fb6562c11ab26775e4b63e6946e05e48f69b06247e7eebc5e0746f0a34601f35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F31 5348 bytes
font_01_sfnt_off00009182.bin
c0a67a37797dca509c585abc918a4b2c329827dafce3b39f2f8c9731eacbfa34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9182 10852 bytes

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