Malicious PDF — malware analysis report

Static analysis result for SHA-256 28b2b4b46cd41a8c…

MALICIOUS

PDF

41.4 KB Created: 2020-09-01 23:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68bbc6ff829156c29f0084c7eedeb3b5 SHA-1: e85dd7fb1ce921eab02aeb8751ac9f25d39ed3a1 SHA-256: 28b2b4b46cd41a8c37a1d27605c2088abe966e663820c18b5390c22c1f2d6810
120 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to appear as search results for technical bypasses, specifically for Samsung devices. The primary link, https://ttraff.com/wix?keyword=samsung+g532f+frp+bypass+apk, redirects to malicious infrastructure, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains references to the target URL and other PDF links, reinforcing the link farm tactic.

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=samsung+g532f+frp+bypass+apk
    • https://static.usrfiles.com/ugd/353d00_7c5398e7187245d8b7156c84efeb830e.pdf
    • https://static.usrfiles.com/ugd/8e1900_6d4c7e53bfde4e65a81dc38129a580ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e29c1580c904fb5afabe02370fb5898.pdf
    • https://static.usrfiles.com/ugd/5cf23b_789c0c8b858f42bdbc7abf7d6ff15a1b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ff72808bf56a467499be93704337857a.pdf
    • https://static.usrfiles.com/ugd/38eac1_857a0705b49246a5821b400b119c6395.pdf
    • https://static.usrfiles.com/ugd/e2c250_6bb8adcf0cd84464a968ac9cd0167d3d.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/98000178676.pdf
    • https://cdn.shopify.com/s/files/1/0438/1510/8765/files/figejobaxuvedubajuxika.pdf
    • https://cdn.shopify.com/s/files/1/0435/5869/9171/files/bildungsroman_definition.pdf
    • https://cdn.shopify.com/s/files/1/0429/6802/3194/files/nokazijoziwugujalutapo.pdf
    • https://cdn.shopify.com/s/files/1/0435/0525/4566/files/41519087490.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_off000061d0.bin
36bf846c731f3f6d3f984f85a2547b45199323463bf185ece203a0f272eb9dd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D0 6016 bytes
font_01_sfnt_off00007647.bin
360dbb04cf7a8b5b798205daac2fe1ef8cf4a2ab8e290d44be46b807f9e4a742		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7647 10120 bytes

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