Malicious PDF — malware analysis report

Static analysis result for SHA-256 3898223053d61473…

MALICIOUS

PDF

44.2 KB Created: 2020-08-29 15:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a4e1891d00f76442aa0cfe5d6388b95 SHA-1: 124349e72dcea05999283ae0572ca867f93c1596 SHA-256: 3898223053d61473fa1d31124850ea6023420a1ba665ba2867a8acbb2a28e5a6
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a link to a known malicious redirector, ttraff.ru, disguised as a solution to a common software problem. It also features a large number of embedded links, many pointing to Shopify, suggesting an attempt to create a link farm for SEO poisoning or to host further malicious content. The presence of a 'download button' lure reinforces the deceptive nature of the document. No scripts were extracted from this sample.

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=disable+adobe+acrobat+dc+sign+in+popup
    • https://cdn.shopify.com/s/files/1/0430/9870/1977/files/18723188187.pdf
    • https://cdn.shopify.com/s/files/1/0431/0568/1557/files/kojibarizopiwojifonare.pdf
    • https://cdn.shopify.com/s/files/1/0435/0646/6975/files/a_level_computer_science_aqa_unit_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2325/files/nugapolapemi.pdf
    • https://cdn.shopify.com/s/files/1/0440/3403/1766/files/dotikedazota.pdf
    • https://static.usrfiles.com/ugd/b8c837_11a53feb3f1d4891977363a9b9ba0a44.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7828048057040e9b529c254bdcd7fb6.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a0a25b781d44df9a49f8fe19a98fd19.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ad506e16d354203ab18ad88794e9d11.pdf
    • https://static.usrfiles.com/ugd/b8c837_29cc4de758b64ca9835645e27474b24e.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed90f2a3be8542cda28f486d9cbf2f16.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf3e10c080e9492e8cd5ef00654012a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_6da7b54f7b7f46569769888c5aff26c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_43692c2d4ef04a4b87c6244a3a50b39d.pdf
    • https://cdn.shopify.com/s/files/1/0434/6803/0102/files/kisumorezepato.pdf
    • https://cdn.shopify.com/s/files/1/0435/5325/9679/files/6781122726.pdf
    • https://cdn.shopify.com/s/files/1/0450/2716/4310/files/abstract_and_concrete_nouns_worksheet_4th_grade.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_off00006dd1.bin
8e81a6b568f365a1050fc9ac5f9676657c7472e8f08da52060ef4232262d95b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD1 5380 bytes
font_01_sfnt_off00008017.bin
4e6c859f45726617360e215b09fa32b4a149747af8aceb00cbb0a285a2b2d87f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8017 10524 bytes