Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd40f7e37a9800b9…

MALICIOUS

PDF

43.3 KB Created: 2020-08-05 05:41:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62fb2eb9651be9a0e2dd512e16ca7956 SHA-1: 720b06c8736a6680bf64bf4cc62bced27f76e853 SHA-256: bd40f7e37a9800b9e66774a72bc10d8eaa07035b16021c448055f2d3c59e5aae
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on Shopify. The presence of a 'download button' lure further supports a malicious intent to redirect users. No scripts were extracted, but the combination of the redirector and link farm heuristics strongly indicates a phishing or scam attempt.

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/pify?keyword=x%25C3%25B3a+trang+file+pdf+online
    • http://files.tikismemorialblog.com/uploads/1/3/1/0/131071067/4379e2.pdf
    • http://files.popova-fashion.com/uploads/1/3/2/6/132682230/5159581.pdf
    • http://files.drbriancasteels.com/uploads/1/3/1/8/131872178/3259337.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/23710102029.pdf
    • https://cdn.shopify.com/s/files/1/0433/0497/6548/files/stardew_valley_wild_plum.pdf
    • https://cdn.shopify.com/s/files/1/0433/4285/6344/files/56585433890.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wadilizesiwegokadokepub.pdf
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/zujokusanorekodufik.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/43174698694.pdf
    • https://cdn.shopify.com/s/files/1/0433/0484/5465/files/70199709200.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9189/files/duwugixes.pdf
    • https://cdn.shopify.com/s/files/1/0431/3759/7607/files/75682654918.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/kuzodubezorawisevo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7757/3539/files/8804681797.pdf
    • https://cdn.shopify.com/s/files/1/0429/2280/3363/files/23694427668.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000543d.bin
ce17e292465afb1e557e317a73d9d9f6bead0a1bf425a6593d61a5a53a62e4c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x543D 5144 bytes
font_01_sfnt_off00006591.bin
d3c9a07828e588ae73f9aecb41760bb87b632780f4f50703832ad62614b7b95f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6591 10424 bytes
font_02_sfnt_off0000891f.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
pdf-font-stream PDF embedded font (sfnt) at offset 0x891F 16204 bytes