Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc8c262d97dbaf52…

MALICIOUS

PDF

50.8 KB Created: 2020-08-30 13:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a473f071800953f1570e3c12851d346 SHA-1: e6e1e64555b1b5dda008b04f8d1675094379b249 SHA-256: dc8c262d97dbaf5213087d1af58b3ee3f635da9a90b5913ac481ca06ebfd7d27
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links. One of these links, 'https://ttraff.ru/wix?keyword=eso+balance+skill', is flagged as malicious. The document body, though heavily obfuscated, also contains this URL and references to 'wkhtmltopdf', suggesting it was generated programmatically. The presence of a malicious redirector link and the sheer volume of embedded links indicate a likely attempt to lure users to malicious content or manipulate search engine rankings.

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/wix?keyword=eso+balance+skill
    • https://cdn.shopify.com/s/files/1/0444/3412/9062/files/xorodejixadowob.pdf
    • https://cdn.shopify.com/s/files/1/0429/2847/2220/files/nuwitedozujegezubogep.pdf
    • https://cdn.shopify.com/s/files/1/0436/4782/8133/files/bl_theraja_basic_electronics.pdf
    • https://cdn.shopify.com/s/files/1/0435/5417/7185/files/32052511092.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/jibolonoxalapedilozafi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6525/2771/files/mibadegefidejupenejamupa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1104/6558/files/lil_boosie_wipe_me_down_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/3672/0798/files/wevegusukuzuginaforekof.pdf
    • https://cdn.shopify.com/s/files/1/0457/6519/7988/files/bootstrap_4_datepicker_format_change.pdf
    • https://cdn.shopify.com/s/files/1/0427/9068/2783/files/96009735189.pdf
    • https://static.usrfiles.com/ugd/77941b_b8fc4b6a7a554511b70cb87bf0e54a72.pdf
    • https://static.usrfiles.com/ugd/b8c837_96bb1220464242ba9e414e2cc5540424.pdf
    • https://static.usrfiles.com/ugd/b88e3d_f8d035d72dfe43bfb31703b535574555.pdf
    • https://static.usrfiles.com/ugd/5ed537_18af9c6a29ad4768a6635fdff3878a71.pdf
    • https://static.usrfiles.com/ugd/f0e51d_882e00daa32a4756b9e10464579a4188.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/
    • https://cdn.shopify.com/s/files/1/0

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b96.bin
5ef9f1699f922e395fb209db4cb4246f191ee51eb6810fe49dff8d9434d13a8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B96 4564 bytes
font_01_sfnt_off00008b1d.bin
0eda9f7208cfccb665e61905ac7dcc3c3a621b8c2f2327e5694c50cd33865318
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1D 10804 bytes
font_02_sfnt_off0000b004.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0xB004 4324 bytes