Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7fe7257e37f65c9…

MALICIOUS

PDF

46.5 KB Created: 2020-08-29 01:12:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7530abb5cff831551e2d014fb0e45d9d SHA-1: 4c4c6b36ad71aefda648ba6232036ab8d9525908 SHA-256: f7fe7257e37f65c94093bae6a9acab3b6a0cc8d30d0b2a51d4dc66db95f51319
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.com/wix?keyword=nuvvu+leka+nenu+lenu+songs+free+download+mp3'. This indicates a social engineering lure, likely attempting to trick the user into downloading malware or visiting a phishing site. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to 'static.usrfiles.com'.

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=nuvvu+leka+nenu+lenu+songs+free+download+mp3
    • https://static.usrfiles.com/ugd/b8c837_f7e4f4d5199546d08fb6467e3b47e4c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_011939e2525b4c8495771338d02c31ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbd5105def9649e1a620f65a4156f451.pdf
    • https://static.usrfiles.com/ugd/b8c837_d3d2a1a2504d4d1ebb71b3d09e395610.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b93a5aa4ae34d488520c5d7e24e6090.pdf
    • https://static.usrfiles.com/ugd/b8c837_785771358b144249a8f55fa1d806eb23.pdf
    • https://static.usrfiles.com/ugd/b8c837_60a2b0324e5e4562ad4f5ea1b57b51ee.pdf
    • https://static.usrfiles.com/ugd/b8c837_e28ad10048174f96ad44a077dbc55c73.pdf
    • https://static.usrfiles.com/ugd/b8c837_92747f49a4494faa82a38d86f85e7e14.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e124e27a9ad40eaa2c231729b4f7778.pdf
    • https://cdn.shopify.com/s/files/1/0433/8909/1998/files/topinikofavetugizowudal.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/kunofetu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8171/8173/files/ccna_study_guide_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/6326/3910/files/weather_radio_walmart.pdf
    • https://cdn.shopify.com/s/files/1/0440/0644/1110/files/9567985496.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_off0000727a.bin
aaaaf3ada7bfa031ee2246290353570d7b5f2da0ba8728fbe11e7795b644b495		 pdf-font-stream PDF embedded font (sfnt) at offset 0x727A 5708 bytes
font_01_sfnt_off000085fa.bin
249de575c5cd1047cf67c4b3130e1837a20d797244468e8e4436e39e7f3411ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85FA 12104 bytes

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