Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2ef4e9ec3209fa…

MALICIOUS

PDF

42.5 KB Created: 2020-08-19 16:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b6f6df7fc62f856d63ac3c39746177a SHA-1: bb8fdc3579728581a58a23d5d74b12601e38d3fc SHA-256: 9a2ef4e9ec3209fad95000d685a941781e0ac10cf4c5c07729863f234847ec06
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDF files, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is presented in the document body as information about 'Android 10 for samsung galaxy s8'. This indicates a social engineering lure to drive traffic to malicious infrastructure.

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=android+10+for+samsung+galaxy+s8
    • http://files.depthoffieldimages.com/uploads/1/3/2/3/132303282/5049930.pdf
    • http://files.millionaireoutlook.com/uploads/1/3/2/6/132682976/nomilejepefagig.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mobisibat.pdf
    • https://cdn.shopify.com/s/files/1/0437/7932/6110/files/11212911617.pdf
    • https://cdn.shopify.com/s/files/1/0434/7287/9782/files/suxiwajatanusesidonimufo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3936/7061/files/lenuge.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/cable_stayed_bridge_design_example.pdf
    • https://cdn.shopify.com/s/files/1/0437/3970/9605/files/genesis_no_reply_at_all.pdf
    • https://cdn.shopify.com/s/files/1/0432/8911/6836/files/fefejatefagagavupape.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/wadafizena.pdf
    • https://cdn.shopify.com/s/files/1/0431/8714/2819/files/22696513035.pdf
    • https://cdn.shopify.com/s/files/1/0431/4326/6458/files/10231946808.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8106/files/barium_chloride_dihydrate_msds.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/72183724772.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1357/files/womitakikemobipulij.pdf
    • https://cdn.shopify.com/s/files/1/0438/3378/6518/files/bozetabimuximudidekasatoj.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_off000063e6.bin
7a157d764a4756055851437785fbb841abaad94c4542679d7c47bf269853d5c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63E6 5772 bytes
font_01_sfnt_off00007780.bin
31a621f997a1c62485cb6027edb3861f46329db8ded060a34e4bb315bdc3b535		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7780 10972 bytes

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