Malicious PDF — malware analysis report

Static analysis result for SHA-256 485202f6de6359b6…

MALICIOUS

PDF

43.2 KB Created: 2020-09-01 15:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8de30de16660e051ab9d0f5b30bb5c5a SHA-1: 2ae1734bf9af0cfe494473630bd123b318122633 SHA-256: 485202f6de6359b6199d0ff1295f02b161b07a4ae4366b2aa12c65c5580c8550
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=android+emulator+vps'. It also exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many of which resolve to static.usrfiles.com. The document body, though heavily obfuscated, contains references to these URLs, suggesting an attempt to drive traffic to malicious infrastructure. 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+emulator+vps
    • https://static.usrfiles.com/ugd/fd3290_377047163ac54d4f97c48cd29832474c.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b3c28caa47b4b82a743482ddadeec86.pdf
    • https://static.usrfiles.com/ugd/b8c837_857fd19f984e4c0fa702c7e3211b0246.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1b405fb8ba84b7eadd8756f7b612aad.pdf
    • https://static.usrfiles.com/ugd/cfa91a_c9f439e02bf9428085b9c19d55e6f50c.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c131cd4cbad45bc85f6eeee93fa6c88.pdf
    • https://static.usrfiles.com/ugd/c1615c_93dde386ece7440d9619fc7125959781.pdf
    • https://cdn.shopify.com/s/files/1/0431/1007/2481/files/d3js_heat_map.pdf
    • https://cdn.shopify.com/s/files/1/0438/4686/0960/files/leather_tanning_process.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/bapurufaxebu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6425/2823/files/viwijigitirekukekam.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_off00005c18.bin
9da287f68c3ee79c19d11845a59ec112b5b3e14a86e1dfe51c8180eb5043a5e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C18 5036 bytes
font_01_sfnt_off00006d11.bin
3666844416d38a1684fb80afc84fcca08e4ada10a288ef58f9325c25c3f9121f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D11 11256 bytes
font_02_sfnt_off00009288.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9288 4324 bytes

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