Malicious PDF — malware analysis report

Static analysis result for SHA-256 d70fd34fb8f6e6a7…

MALICIOUS

PDF

48.3 KB Created: 2020-09-01 03:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90187bbe7c335395b095e1c23b84371d SHA-1: 61ea8d57f0728e03503d47d2312ea66bd8d65019 SHA-256: d70fd34fb8f6e6a758ccb95c99ab24da4896327bd4c5bc264c65c6e8a607f91e
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=vsco+x+latest+apk'. This URL is presented within the document body, suggesting a social engineering lure to trick the user into downloading an application. The PDF also exhibits characteristics of a link farm, with numerous external links, further supporting the social engineering pretext.

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=vsco+x+latest+apk
    • https://static.usrfiles.com/ugd/b8c837_a4391f989f0747ad83aa98cfd1849e2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_3be500aae3ec4f30908e389f6d583f57.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e2655208fb9443ebaab11851cd59095.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78682713185.pdf
    • https://cdn.shopify.com/s/files/1/0435/8910/7869/files/mu_c_o_form_ai.pdf
    • https://cdn.shopify.com/s/files/1/0428/6709/7756/files/damagozajokitepetow.pdf
    • https://cdn.shopify.com/s/files/1/0431/2452/3170/files/make_virtualenv_python3.pdf
    • https://cdn.shopify.com/s/files/1/0437/7142/9016/files/jozaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/1248/8348/files/a_user_s_guide_to_network_analysis_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7928/files/56087510346.pdf
    • https://cdn.shopify.com/s/files/1/0437/8217/6917/files/abigeato_significado.pdf
    • https://cdn.shopify.com/s/files/1/0440/5572/4197/files/hallelujah_noty_na_klavr.pdf
    • https://cdn.shopify.com/s/files/1/0441/2289/8584/files/amparito_roca_banda.pdf
    • https://cdn.shopify.com/s/files/1/0428/9436/0743/files/31900530136.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_off00007e4b.bin
a38c24d71cc0bc84ddde23f2c0d0671f1fa7f55771a9464ff9e470cbcdcab1ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4B 4928 bytes
font_01_sfnt_off00008f34.bin
f440c9ab923bc330d9baec0a5cb081cb0a5f3fb15034f641007595d67a1fa000		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F34 11040 bytes

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