Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d8901e6e5e9e082…

MALICIOUS

PDF

44.4 KB Created: 2020-09-05 15:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 570a7af84c01dff188b5856b3c1e6462 SHA-1: 3fdc9965d7ea529de273d3e04d0d980e115b3b9f SHA-256: 3d8901e6e5e9e08211a5d4f81ecee7f262de5ea428a38de5e4ffb1c6cf216589
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to shopify.com domains, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.me, which is presented with a search query for 'android studio gradle latest version'. This indicates a phishing or social engineering attempt to redirect the user to malicious content. 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.me/wix?keyword=android+studio+gradle+latest+version
    • https://cdn.shopify.com/s/files/1/0440/4304/2966/files/95780616534.pdf
    • https://cdn.shopify.com/s/files/1/0429/3961/3347/files/59128058579.pdf
    • https://cdn.shopify.com/s/files/1/0429/8683/2035/files/27258958324.pdf
    • https://cdn.shopify.com/s/files/1/0433/4003/8302/files/losegeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6566/files/21624391015.pdf
    • https://cdn.shopify.com/s/files/1/0433/9970/8821/files/penyakit_jantung_koroner_usu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2741/4696/files/dosapasubom.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6143/files/bigirilux.pdf
    • https://cdn.shopify.com/s/files/1/0436/5041/6793/files/bgw210_port_forwarding.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81603963226.pdf
    • https://cdn.shopify.com/s/files/1/0435/6908/6623/files/20849178974.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/japji_sahib_english.pdf
    • https://static.usrfiles.com/ugd/1df9ea_2fd8a78d871d46939605b9b96bde9bd6.pdf
    • https://static.usrfiles.com/ugd/f4de5e_b5682dd9522645edad7a655afe308905.pdf
    • https://static.usrfiles.com/ugd/a2e20a_9d2b1607e0f54236bb67f82209e810d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_3849cf880a9d411e869eb4303ccdca74.pdf
    • https://static.usrfiles.com/ugd/9e41f0_32d1d4f85c1b4ec09c80ce7ebad46bb9.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_off0000704c.bin
b9936e5e8e35aeac3ea597bdbba405523d04e29b306572f71d53f0c85d3a6a72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x704C 5040 bytes
font_01_sfnt_off00008184.bin
eec2c07352c76090ce8094953ef0fda1059eda2adc63c3ce1b398f923b033469		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8184 10144 bytes

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