Malicious PDF — malware analysis report

Static analysis result for SHA-256 5776dc0aceb879fb…

MALICIOUS

PDF

48.2 KB Created: 2020-08-31 07:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d1a2acef1a5ab9acbdd9dfeb462de9a SHA-1: 8dc58e1ba85c7e33df64d5a1b778c4ea8f381dd9 SHA-256: 5776dc0aceb879fbcefd499fbf7a01ee2671bede4e683967bd53d48defee4f03
120 Risk Score

Malware Insights

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

The PDF file contains embedded links that point to a known malicious redirector infrastructure, specifically `https://ttraff.cc/wix?keyword=rubix+cube+solution+guide`. The document body, though heavily obfuscated, contains text related to a 'Rubix cube solution guide', likely serving as a lure. The presence of a large number of external PDF links, many pointing to `static.usrfiles.com` and `cdn.shopify.com`, suggests a link farm or SEO poisoning tactic to increase visibility of the malicious redirector. No scripts were extracted from this sample.

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.cc/wix?keyword=rubix+cube+solution+guide
    • https://static.usrfiles.com/ugd/b8c837_7471b1917eb94287b999ede0c3e7c742.pdf
    • https://static.usrfiles.com/ugd/5926b4_a27ebf6063ab49368b0eaa49ec21d6fd.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c47477d0a47479489360f4e2d25dbbc.pdf
    • https://static.usrfiles.com/ugd/ba3095_4861a1c6d98c4be083e872265c3abbba.pdf
    • https://static.usrfiles.com/ugd/0c4177_5d530d83a1eb408a9cf8a67aece9ddd9.pdf
    • https://cdn.shopify.com/s/files/1/0434/8621/6344/files/26362245482.pdf
    • https://cdn.shopify.com/s/files/1/0429/3427/2159/files/jemufevejozexuwesa.pdf
    • https://cdn.shopify.com/s/files/1/0460/6781/0459/files/89697607657.pdf
    • https://cdn.shopify.com/s/files/1/0432/0906/4603/files/54969432119.pdf
    • https://cdn.shopify.com/s/files/1/0432/6732/6112/files/76189686381.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/hate_to_want_you_alisha_rai_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/dorinunaredobitepebobiwop.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3336/files/gigite.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_off000071f1.bin
4cf3fdcabc74d320b040284e275c235a05165ac15826300bae27b77dee8f24dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F1 4900 bytes
font_01_sfnt_off000082ad.bin
5ed185517aee7001a2f0528d81aae65e7d5152af1807029503097692dbb9b2bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82AD 10212 bytes
font_02_sfnt_off0000a56a.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA56A 4324 bytes

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