Malicious PDF — malware analysis report

Static analysis result for SHA-256 4816ac612af6f346…

MALICIOUS

PDF

54.8 KB Created: 2020-08-29 07:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: beb24f389f0e057ccab6fdf166f2471f SHA-1: b6c91e5c4a574db669d1dcc56b2a10ad25e1b71e SHA-256: 4816ac612af6f346aefd396e1401a45df26bd61451593092fb74287972e6d0f4
128 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many pointing to Shopify-hosted PDF files, which is indicative of a link farm. One of the primary links directs to a known malicious redirector. The presence of a 'download button' lure further suggests an attempt to entice users into clicking malicious links. The document body contains garbled text but includes the malicious redirector URL.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=matricom+g-+box+q+firmware
    • https://cdn.shopify.com/s/files/1/0428/0123/4076/files/reliru.pdf
    • https://cdn.shopify.com/s/files/1/0435/6318/8383/files/technical_analysis_explained_martin.pdf
    • https://cdn.shopify.com/s/files/1/0439/1724/6632/files/active_learning_activities.pdf
    • https://cdn.shopify.com/s/files/1/0431/5598/0445/files/bull_zip_writer.pdf
    • https://cdn.shopify.com/s/files/1/0438/3077/1869/files/a_chorus_line_monologues.pdf
    • https://static.usrfiles.com/ugd/b8c837_f26ee052378b49ab8788594b0c1bd47c.pdf
    • https://static.usrfiles.com/ugd/b8c837_311dbce3144d43c98b3106dcf7d0116c.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba0035ae294b45249612e16d9c4d1415.pdf
    • https://static.usrfiles.com/ugd/b8c837_bac66e0e20f640f39c307edbb36a2232.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d8d25558c324058b98cf572a12700a8.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/98964192023.pdf
    • https://cdn.shopify.com/s/files/1/0432/5815/1072/files/data_analysis_in_python_with_pandas.pdf
    • https://cdn.shopify.com/s/files/1/0433/4839/4142/files/laminate_flooring_installation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/6957/8147/files/17984904236.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
font_00_sfnt_off00007a4f.bin
8d2b4951d42798871e6d87025c801c17080d0489cf995d30b74e550eef022835
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4F 5136 bytes
font_01_sfnt_off00008be2.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE2 1800 bytes
font_02_sfnt_off00009470.bin
0099c8a880adc8cd2228e0b274028bf5de3567abe63d54c22eee837e8abf674b
pdf-font-stream PDF embedded font (sfnt) at offset 0x9470 13768 bytes
font_03_sfnt_off0000bff4.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xBFF4 4324 bytes