Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e16afa5d5b6cbfd…

MALICIOUS

PDF

44.1 KB Created: 2020-08-30 08:28:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54ad587608c2f9f21de2f0c1cf7bb025 SHA-1: a99e5b979abe5c433a6b75242034eb83d3cc6f06 SHA-256: 2e16afa5d5b6cbfd69cd9664c71d17edd5ec7fd026985d202e7b847e3de75a14
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text fragments that, when combined with the heuristic findings, suggest a lure related to 'the power of birthdays stars numbers'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content. The presence of many links to static.usrfiles.com suggests a link farm or content hosting strategy.

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=the+power+of+birthdays+stars+numbers+free+download
    • https://static.usrfiles.com/ugd/8cbfce_8898d14c53cc4989b0f4d59f634a1df8.pdf
    • https://static.usrfiles.com/ugd/b8c837_3fd14edd0c424e399f80c1a2b0f6c6e0.pdf
    • https://static.usrfiles.com/ugd/6df952_2d0b5106c7004734a47d005dac465743.pdf
    • https://static.usrfiles.com/ugd/b8c837_5675f68aa448463e81aba911dfb00fe6.pdf
    • https://static.usrfiles.com/ugd/b8c837_c687637e74f74d27a788dbd22bed4b5b.pdf
    • https://static.usrfiles.com/ugd/b8c837_3dae7c95d2ea480b9f0a0079271707eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_312d2b7503a846dc952064edeeabe65f.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2fc01be6ca84681814b5d766f228403.pdf
    • https://static.usrfiles.com/ugd/b8c837_bffe960db9a440b49904ed44d1a28be5.pdf
    • https://static.usrfiles.com/ugd/a1fb72_b34f5a74e2e54ecc923b1b5e63c4c9be.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbad77c40c464302a7f3396c96280163.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_off00005f52.bin
fed1351d4742fd8f1e5b616f9c0d1fdbd50f822f7265fb00981416bf35ba5ded		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F52 5444 bytes
font_01_sfnt_off000071ae.bin
a9c9040f450cc23ceb00d8a988a73bd576c34dadbbd55ff2bdabfb5cfbba61ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71AE 10416 bytes
font_02_sfnt_off00009563.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9563 4324 bytes

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