Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c0bd7185191f0f…

MALICIOUS

PDF

49.7 KB Created: 2020-08-04 01:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51c5ccee4394c1edca3bb2112e80aea4 SHA-1: a84a12a062b0e2e46fb90146eeb6619042b9bfaf SHA-256: e8c0bd7185191f0ff939862b9b3b4cfebe30ab70288faeeb89de4e18fa6b3aae
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of numerous embedded links. One critical heuristic firing indicates a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=bob+ong+si+pdf'. Another critical heuristic identified a PDF link farm with 28 external PDF links, predominantly hosted on cdn.shopify.com. The document body contains garbled text but also includes the malicious URL, suggesting a lure to external content. 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.ru/pify?keyword=bob+ong+si+pdf
    • http://files.515worldwide.com/uploads/1/3/0/7/130776408/6980691.pdf
    • http://files.jacquelinesalvador.com/uploads/1/3/0/8/130815437/7922258.pdf
    • http://files.roberthortonphotography.com/uploads/1/3/0/8/130814605/toleg.pdf
    • https://cdn.shopify.com/s/files/1/0432/2462/9411/files/jikalanetenonok.pdf
    • https://cdn.shopify.com/s/files/1/0437/5340/6618/files/selfcare._rr._com_change_password.pdf
    • https://cdn.shopify.com/s/files/1/0431/4316/8156/files/beatles_yesterday_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/64658078535.pdf
    • https://cdn.shopify.com/s/files/1/0431/1282/4993/files/bixewodusukuwuxodujatopa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2077/files/jixunitibofo.pdf
    • https://cdn.shopify.com/s/files/1/0440/7210/8197/files/56005441141.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/wujozofuwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8211/3433/files/mp3_skype_recorder.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/92823351526.pdf
    • https://cdn.shopify.com/s/files/1/0437/4416/6037/files/julibedepo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007100.bin
9730e471cbebd006091b6b1cd32327fece582a0fe8b04dbbb4a35f92e0c5d7fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7100 5060 bytes
font_01_sfnt_off00008254.bin
69b42e99d827062f82120e8dfb89a8c24300369d94dab89df11173c66c5da862		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8254 10028 bytes
font_02_sfnt_off0000a4cf.bin
c285fb7e0a468b536b5b50a218c3479f047524ad23ae0ce850d1b48518667c83		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4CF 16144 bytes

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