Malicious PDF — malware analysis report

Static analysis result for SHA-256 27bb77617cf0d091…

MALICIOUS

PDF

62.6 KB Created: 2020-08-21 19:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 188364cac57431203281e882e0e2ed39 SHA-1: 0b66999e8489c30f150563a21edd16eff7cce9e4 SHA-256: 27bb77617cf0d091fc11485439a4e18c16a600e011201090be7a007b9f747a0b
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, specifically pointing to 'ttraff.cc'. This link is presented within the document body, likely disguised as a call-to-action or download button, as indicated by another heuristic. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The primary malicious IOC is the redirector URL, which is designed to lead the user to further malicious content.

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.cc/pify?keyword=amlogic+s912+android+tv+rom
    • http://files.couplematters.org/uploads/1/3/1/4/131452942/d3288e.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89647405972.pdf
    • https://cdn.shopify.com/s/files/1/0436/4782/8118/files/informe_de_auditoria_informatica_ejemplo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5407/9910/files/canon_t3i_firmware_1._0._2.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/77850687297.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/828580197.pdf
    • https://cdn.shopify.com/s/files/1/0429/7516/6620/files/defoxeniladolenulaxan.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/netimuxoladofebagod.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/98594765327.pdf
    • https://cdn.shopify.com/s/files/1/0437/4760/6679/files/watch_men_in_black.pdf
    • https://cdn.shopify.com/s/files/1/0428/5225/3863/files/vomiting_pathophysiology.pdf
    • https://cdn.shopify.com/s/files/1/0438/9430/9019/files/gozitopejedazemabisipevis.pdf
    • https://cdn.shopify.com/s/files/1/0449/1404/9191/files/shakespearean_sonnet_form.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_off00009460.bin
2eb32c7bddbade19c375903feb74f53d7e1998558cb402afb12dc5000a8057fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x9460 5648 bytes
font_01_sfnt_off0000a777.bin
2b4976bd5700831a6739eb7f99079ca960227e63ecdf520b00463d8acf8bf440
pdf-font-stream PDF embedded font (sfnt) at offset 0xA777 2504 bytes
font_02_sfnt_off0000b25e.bin
91bd5b37c3335b638551cbba17487688c1ca9c672d25b3fdf887af1e19559624
pdf-font-stream PDF embedded font (sfnt) at offset 0xB25E 10792 bytes
font_03_sfnt_off0000d751.bin
aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0
pdf-font-stream PDF embedded font (sfnt) at offset 0xD751 16312 bytes