Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e7c782cf230df44…

MALICIOUS

PDF

45.0 KB Created: 2020-08-20 02:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e685b2082bdbe4a7ef443a257f8f835 SHA-1: 640c3b1858972d70cf35f803bb94844ef3b816e4 SHA-256: 8e7c782cf230df4411d9328d778c9c7cfe830ed6442c90967f1dc04388fe5434
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains text fragments that appear to be a lure for applying for leave, combined with the malicious redirector URL. This suggests the document is designed to trick users into clicking the malicious link, likely leading to further compromise.

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.ru/pify?keyword=apply+leave+formal+letter
    • http://reveno.rapidintegration.com/uploads/1/3/0/9/130969332/wugoxab-pedefepa-danovinekik-bololur.pdf
    • http://xopezawe.scalelive.com/uploads/1/3/0/7/130775740/bojuzebakem-jufudu.pdf
    • http://files.ewb-midmaryland.org/uploads/1/3/1/4/131483209/pitedozimugatag.pdf
    • https://cdn.shopify.com/s/files/1/0432/7325/7116/files/wiwen.pdf
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/givulim.pdf
    • https://cdn.shopify.com/s/files/1/0429/4482/3452/files/bilbao_metro_map.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/plantas_alimentcias_no_convencionais_no_brasil.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/alopecia_androgenica_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0461/6791/6696/files/huawei_software_update_tool_free.pdf
    • https://cdn.shopify.com/s/files/1/0449/9626/4094/files/general_principles_of_accounting.pdf
    • https://cdn.shopify.com/s/files/1/0428/2574/4547/files/meliwutojujolilaxiwebuwob.pdf
    • https://cdn.shopify.com/s/files/1/0437/1300/3674/files/vazufazonukix.pdf
    • https://cdn.shopify.com/s/files/1/0438/1098/0000/files/99688938679.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_off00007337.bin
92bc39dd9d1c9e9a4bd7a01d702ed1b70abe791a2bbe23487b67a512910af1b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7337 5020 bytes
font_01_sfnt_off00008447.bin
7e23aebd4041916cb715c3334f88df139ccffd09755d726c280ca9e8edbe566b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8447 10316 bytes

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