Malicious PDF — malware analysis report

Static analysis result for SHA-256 a838c616e5571e7f…

MALICIOUS

PDF

41.8 KB Created: 2020-08-09 18:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4162f2de530283ccc3364d12f84b0e1b SHA-1: 675002e5e3aaf92233d44d065bf6d26c8b7ddbd8 SHA-256: a838c616e5571e7f71210bbfaa4bcbb8462fbb8f8b8f9946db66c3b160818cd6
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, identified as a 'PDF SEO Link Farm' heuristic, pointing to various PDF files hosted on Shopify. One of these links redirects through 'ttraff.com', a known malicious redirector. The primary intent appears to be driving traffic to these external resources, potentially for SEO spam or to distribute further malicious 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.com/pify?keyword=astm+a193+standard+pdf+free+download
    • http://pomadodo.leasidebowls.ca/uploads/1/3/1/1/131164250/nigaxemadufumizijo.pdf
    • http://gitozofev.plant-miner.com/uploads/1/3/0/8/130874038/9009649.pdf
    • http://files.balasanabarbarayoga.com/uploads/1/3/1/0/131070535/0944eb2.pdf
    • http://files.cfhsbands.org/uploads/1/3/1/8/131856333/rojifuvuv_wisifomivefi_tumifinob_mipemumamivi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4220/9945/files/jokes_and_riddles.pdf
    • https://cdn.shopify.com/s/files/1/0440/3747/2421/files/lojogodotixet.pdf
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/dusozepinis.pdf
    • https://cdn.shopify.com/s/files/1/0428/6201/8727/files/41107008185.pdf
    • https://cdn.shopify.com/s/files/1/0431/7007/0690/files/79619011467.pdf
    • https://cdn.shopify.com/s/files/1/0431/5863/4658/files/topexetagik.pdf
    • https://cdn.shopify.com/s/files/1/0437/2440/6935/files/furugusumokuwetawapiramu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0870/5187/files/9517632897.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/bteb_diploma_exam_routine_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/6148/6503/files/licensed_to_drive_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0436/3314/8062/files/1519532421.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5435/files/50523922008.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_off00006482.bin
99864fd6dbea7abd92acbaa248fc0370b2c06224cc2ab518cf6e7ae82dfc33de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6482 5640 bytes
font_01_sfnt_off000077ac.bin
1b2d96747658b0c1702e1b00f2e287f4283463588e6ac4a28b262e3eb3ee65bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77AC 9984 bytes

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