Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb2bc24a3d728f95…

MALICIOUS

PDF

71.6 KB Created: 2020-09-01 23:23:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9fa83dd33084a6a986e882ff4449dea SHA-1: 194802ddee3354617808c21374e722ef2ddcd16f SHA-256: cb2bc24a3d728f95df76c89a302368df3f44aecbe81d2846e2c0eee3512c2e35
128 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a 'cash flow statement format xls'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, and 'SE_INVOICE_LURE' suggests the document's content is designed to trick the user. The PDF also hosts a large number of external links, indicating a potential SEO poisoning or link farm strategy. No scripts were extracted, limiting the analysis of direct payload execution.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.link/wix?keyword=cash+flow+statement+format+xls
    • https://static.usrfiles.com/ugd/b8c837_b5d72d8fb86b42059382dd488905e9a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc58c533a3854ec8a080083273e8b5db.pdf
    • https://static.usrfiles.com/ugd/d1d005_f9311fb913894f26b67bedc130752904.pdf
    • https://static.usrfiles.com/ugd/173616_c6f8c46b292b40fc876e6826b68a2de4.pdf
    • https://static.usrfiles.com/ugd/b8c837_e962df802f1f4e73a24d8e0deb434db3.pdf
    • https://static.usrfiles.com/ugd/e745be_e696b4f316a34bd48e6cb2328c2cb6c6.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_f99fa0fddb43498c94d602a508a16e65.pdf
    • https://static.usrfiles.com/ugd/47b1e8_ccd9716f87f8421eb12a38b5c25f7b07.pdf
    • https://static.usrfiles.com/ugd/b8c837_70daa1f1fdf1455cbc981c6cfc1217fe.pdf
    • https://static.usrfiles.com/ugd/4fb05f_db16a6258cd54d079e5df60441304036.pdf
    • https://static.usrfiles.com/ugd/48f461_5660ab13b9c9495499cffd9338ec5fda.pdf
    • https://static.usrfiles.com/ugd/b8c837_db56a411045246a7832b15660483f191.pdf
    • https://cdn.shopify.com/s/files/1/0434/9385/1302/files/games_bow_master_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7596/files/cyberghost_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0437/3803/8426/files/campana_noticias_las_24_horas_informa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8688/8601/files/31700443780.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_off0000d2b2.bin
3b89a1333aa93e194de12c5c5da229a8f3a969ace6b07a90c5323b9ece6747ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B2 2828 bytes
font_01_sfnt_off0000dcad.bin
8fb243124f4cefd72d0261a254ada2439b718bbb9d85d386a643fe9454d9a10e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAD 5072 bytes
font_02_sfnt_off0000edd5.bin
49f549c01ced9e67ac4f7308c135ade69c8063eac60294bfd7166bff3d4a43d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD5 10300 bytes

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