Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dcd8fcb77445b04…

MALICIOUS

PDF

38.2 KB Created: 2020-09-13 01:41:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8dc533a7e29834e9c10cee008cf0b006 SHA-1: 94bb4b22ed0fc5d948ff672ec59988342d8359f6 SHA-256: 3dcd8fcb77445b04be156504c3fcb8eb0e6345e5f2fa97153e66e6c8f23935a8
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a common technique for SEO poisoning or phishing campaigns. One of the embedded URLs, 'https://ttraff.me/wix?keyword=franklin+head+start+nh', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it's a primary lure. The presence of numerous other PDF links further supports the 'link farm' heuristic.

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.me/wix?keyword=franklin+head+start+nh
    • http://rijuwosag.gdebuque.com/uploads/1/3/0/7/130775045/gelilegaratupadojet.pdf
    • http://files.biggsbassethounds.com/uploads/1/3/1/8/131857071/84fb7a2093dbc.pdf
    • https://cdn.shopify.com/s/files/1/0430/0872/1049/files/34523968374.pdf
    • https://cdn.shopify.com/s/files/1/0436/7794/1913/files/proton_backpack_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0464/9143/5176/files/cessna_182_manual_parts.pdf
    • https://cdn.shopify.com/s/files/1/0438/8922/9979/files/69954946312.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7313/files/46156724346.pdf
    • https://static.usrfiles.com/ugd/f103bb_cbe1cc14cb794d089f6c361959735ae2.pdf
    • https://static.usrfiles.com/ugd/d51d36_a55f9f3858324b66b1f5df13a4cb9287.pdf
    • https://static.usrfiles.com/ugd/b8c837_1dcce9e24629473e9e374a9c32e7160e.pdf
    • https://static.usrfiles.com/ugd/625844_b8c7a7e3ea654c54bdbd0f500926d4bd.pdf
    • https://static.usrfiles.com/ugd/cc3ca9_36bb0c5f606a4e8095d7ad7c5b0ca36c.pdf
    • https://static.usrfiles.com/ugd/314c35_9ee16cbee72d4071ae87126294522dcc.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_off000057e9.bin
1b1c890c5e7147750c1f81a2bfb59f41a69775499c421c8dc8345ddc2b3d7917		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57E9 4932 bytes
font_01_sfnt_off000068a4.bin
9f0e56ecc2d0ec51c48b2703d0926c743a66e1488545dd9c9aca063104e10213		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68A4 10384 bytes

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