Malicious PDF — malware analysis report

Static analysis result for SHA-256 83af91841a842c57…

MALICIOUS

PDF

35.2 KB Created: 2020-08-10 12:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c68aadac5357ae7eebf312c0d7a943d SHA-1: 166a1eb9faf2109ade7fdd32ddd1f6b16daa1e1b SHA-256: 83af91841a842c5766d9b5f2cdb0fb845401dd736a20a61df1d7bcdbdbb6d770
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which are designed to appear as legitimate document downloads but redirect to potentially malicious sites. The primary redirector URL is identified as malicious. The document body contains text related to 'Chacha chaudhary comics in english pdf free' and the tool 'wkhtmltopdf', suggesting a lure to download content that ultimately leads to a malicious redirect.

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=chacha+chaudhary+comics+in+english+pdf+free
    • http://files.jumpstartpreschoolavon.com/uploads/1/3/0/9/130969452/jonape-jakipusazara-linumil-gesepelemiruz.pdf
    • http://files.galerianasse.com/uploads/1/3/1/0/131071191/dutetotokubuzufuw.pdf
    • http://files.create-diy-online.com/uploads/1/3/0/7/130739595/abbcd2f4.pdf
    • http://files.golden-aquarium.com/uploads/1/3/0/7/130776712/sisivogimizenurulu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6186/0757/files/what_is_the_abbreviation_for_missouri.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/43286259270.pdf
    • https://cdn.shopify.com/s/files/1/0432/4468/3419/files/javojufinoxinuzuxif.pdf
    • https://cdn.shopify.com/s/files/1/0435/8127/6319/files/list_of_aerospace_companies_in_bangalore.pdf
    • https://cdn.shopify.com/s/files/1/0433/3810/4985/files/tanatologia_que_es.pdf
    • https://cdn.shopify.com/s/files/1/0435/6567/8755/files/ayushman_bharat_name_list.pdf
    • https://cdn.shopify.com/s/files/1/0437/8558/4797/files/2010_volkswagen_jetta_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/3142/8248/files/fundamentals_of_radiation_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0437/6592/3992/files/74647869448.pdf
    • https://cdn.shopify.com/s/files/1/0435/5571/7271/files/candido_portinari_biografia.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/witemumub.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_off00004c35.bin
b08ee3495e7b9c2c78ade6d1d2e66f47552e7c6f9360e610108e848b224adb22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C35 5576 bytes
font_01_sfnt_off00005f04.bin
04ca0a5c24c6065bd83ce4042e945941c0de0fc6419c54ebfe5522707c88446d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F04 9584 bytes

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