Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ca00825ac7a654…

MALICIOUS

PDF

41.7 KB Created: 2020-08-23 10:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 651c6158e057e8595147754e0c8e6354 SHA-1: 1695f83a4240746970fa050e58eeb883fb318333 SHA-256: b9ca00825ac7a654b027d3b2d48a7cc3aed430157ec66d1655beeee7e7bede68
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body text and embedded URLs suggest a lure to download an app, but the primary link redirects to a known malicious domain. The presence of a link farm heuristic further indicates a malicious intent to drive traffic to potentially harmful sites.

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=best+brightness+control+app+android
    • http://files.solivitarvclub.com/uploads/1/3/0/7/130738918/giwulap.pdf
    • https://cdn.shopify.com/s/files/1/0430/0367/4785/files/autonomous_system_for_differential_equations.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1520/files/16790667641.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6533/files/nationalism_and_ethnic_conflict.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/palmistry_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/2853/6731/files/davisimulagikujagik.pdf
    • https://cdn.shopify.com/s/files/1/0438/1822/1728/files/7643768241.pdf
    • https://cdn.shopify.com/s/files/1/0431/2717/7380/files/51984458410.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/weatherbeeta_fly_sheet_neck_cover.pdf
    • https://cdn.shopify.com/s/files/1/0437/2758/5430/files/80306401341.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_off0000659f.bin
bd29272c9228fa28e752b5a2f371cefd7e5132655d03ccc642f0fb8454cbcdda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x659F 5524 bytes
font_01_sfnt_off00007854.bin
d157e469b5854f9190925e6b5990f49f381816d7d5da424b0eb25870e27d7566		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7854 9952 bytes

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