Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b703fba4887cbee…

MALICIOUS

PDF

48.2 KB Created: 2020-08-31 00:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d5a3cc532d70b998ed7d67e44528b87 SHA-1: 539393bbb3b821f602772e0472553ab653526ac8 SHA-256: 8b703fba4887cbeeba90bda84fbe1587058353cec26344efe4148ce08c3fd02a
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One of these links, https://ttraff.com/wix?keyword=restaurante+a+trrincheraa, is identified as a known malicious redirector. This suggests the document's primary purpose is to direct users to malicious infrastructure, likely for further exploitation or phishing.

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/wix?keyword=restaurante+a+trrincheraa
    • https://static.usrfiles.com/ugd/b8c837_cd1ce91826c9476d95f0a45d7b407795.pdf
    • https://static.usrfiles.com/ugd/b8c837_d69cf6a77077402485e9425218dd4ffc.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_12754f84bb984133aa5a83c12a562949.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b7fd98a56984821900bff5466b75b4a.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc426488aaa941b1bb5d171a81a6af77.pdf
    • https://cdn.shopify.com/s/files/1/0462/7680/4768/files/a_filmywap_2018_bollywood_movie.pdf
    • https://static.usrfiles.com/ugd/01bc73_5027af15b7c6438788c2a6f97411d491.pdf
    • https://static.usrfiles.com/ugd/704566_2daf1e5fa4b04b36828cb0e8f668247a.pdf
    • https://cdn.shopify.com/s/files/1/0429/8312/9251/files/48396767389.pdf
    • https://cdn.shopify.com/s/files/1/0434/3198/5309/files/xozisuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7209/4362/files/3004832284.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_off000059a3.bin
7fae7d5fb742607276246e8df7226516bd760d80da4b6db9b8a45f0d1aaca49f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A3 4860 bytes
font_01_sfnt_off00006a1a.bin
bac7c9394e5186956c8526326d85c07a2bf820668ed84b90ff55891a6db08ae1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1A 4692 bytes
font_02_sfnt_off00007726.bin
847aae5b8cd22938c700f64fd55e8360f5f016675e627c874f0d941f22773632		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7726 11232 bytes
font_03_sfnt_off00009d7b.bin
fb2ac63fb075d256b5587570191ecec806cb29c29da4ebedfc8653ce907d9040		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D7B 16384 bytes

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