Malicious PDF — malware analysis report

Static analysis result for SHA-256 83544baba0eff91f…

MALICIOUS

PDF

64.4 KB Created: 2020-08-14 04:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 657063dd7be324f03cb3b7440e5fc22f SHA-1: 87432c9e88f290b6db227faec9f93aea76a5c396 SHA-256: 83544baba0eff91ff39607a6328daca7f347519a3df62a3fcd0e9d885ac86143
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, which is the primary indicator of malicious intent. The document body, though partially corrupted, contains text related to 'Valmiki ramayanam in telugu pdf download' and a URL that appears to be a search query, suggesting a lure to trick users into clicking the malicious link. The presence of numerous Shopify links, while some are benign, indicates a link farm strategy to obscure the malicious destination.

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/wb?keyword=valmiki%20ramayanam%20in%20telugu%20pdf%20download
    • http://pijuxofak.caputispub.com/uploads/1/3/1/8/131871984/gavukevewigi_pajasovazujobo_welobowizasom_kumirolakose.pdf
    • http://files.salisburysdachurch.org/uploads/1/3/2/6/132682829/nakape.pdf
    • http://files.airconditioningcambridge.co.uk/uploads/1/3/0/7/130775286/napuwuzoduzu.pdf
    • http://files.yoderbrothersantiques.com/uploads/1/3/1/8/131856414/poveli.pdf
    • https://cdn.shopify.com/s/files/1/0431/4438/0578/files/lubeme.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/candle_in_the_wind_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/9440/0414/files/peter_benchley_jaws.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/83091144500.pdf
    • https://cdn.shopify.com/s/files/1/0437/6385/9610/files/vuzaviminubagobi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7319/8487/files/a_and_an_worksheets_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0449/4236/0744/files/precalculus_textbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7962/files/fubafidozidofak.pdf
    • https://cdn.shopify.com/s/files/1/0431/7836/0987/files/antonin_artaud_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0439/5941/9038/files/99056955757.pdf
    • https://cdn.shopify.com/s/files/1/0433/5324/3816/files/kugasulipofureker.pdf
    • https://cdn.shopify.com/s/files/1/0433/2699/6633/files/15813507232.pdf
    • https://cdn.shopify.com/s/files/1/0438/6104/9494/files/english_club_activities_for_high_school_students.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000d513.bin
259b3de09d7367a126290e2ae09d999bbff39db30a1ed3d84b40e19f2facb04b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD513 9400 bytes
font_00_sfnt_off00008826.bin
ba53c9a98875575835b3b5153f727f149d067092366ffc622a3e44293378f20c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8826 5404 bytes
font_01_sfnt_off00009a8f.bin
b9b49a3c453c53986d7a61d4291ac5a87065d82ff96be43ef0dca6427e6dc540		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A8F 3772 bytes
font_02_sfnt_off0000a633.bin
b0c78b5ee6f4da14278db0fc2c35846cb783a480b546a90998e662fce6e1dc27		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA633 15756 bytes

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