Malicious PDF — malware analysis report

Static analysis result for SHA-256 4536c2ffdeb7d752…

MALICIOUS

PDF

44.6 KB Created: 2020-08-31 03:15:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f83cdce403c194ead1d3f65b2099ccde SHA-1: 3e2a3e3cdc18619aacc0b7368f88602855db100e SHA-256: 4536c2ffdeb7d752cae3c73f425c5dd8f5264aa24bd284ccabf2f73a2eace58a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify and static.usrfiles.com domains, suggesting a link farm or redirection strategy. The primary intent appears to be directing users to malicious infrastructure under the guise of tourism information.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=copenhague+guia+turismo
    • https://cdn.shopify.com/s/files/1/0432/1529/0529/files/30008695786.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7884/files/lagixekisokavivupulisiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/cpp_sign_in.pdf
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/breve_historia_de_la_revolucion_industrial_iigo.pdf
    • https://static.usrfiles.com/ugd/d902bb_e643301a60034115893a40fc11753706.pdf
    • https://static.usrfiles.com/ugd/a640e9_f045afba85624f5592e809a22a1a8b03.pdf
    • https://static.usrfiles.com/ugd/b8c837_1d857966b17f415e9e175e82239d8f4d.pdf
    • https://static.usrfiles.com/ugd/c0b427_ccf309ce3f134890bd236c9495ea1d46.pdf
    • https://static.usrfiles.com/ugd/d902bb_dcf27f556e744435b53c7621fa0474d7.pdf
    • https://static.usrfiles.com/ugd/7f16bd_d0bd21767e6d48c1980efdbb05e4d3a3.pdf
    • https://static.usrfiles.com/ugd/837d34_9ed264cda55e4a5297b85b4a0918b1ca.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005aba.bin
78672d5812d56ccae64bb1f0108f8caf02a38c7cc064d816b07b01b8a9a6b369		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ABA 5108 bytes
font_01_sfnt_off00006be1.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE1 1800 bytes
font_02_sfnt_off0000746e.bin
c5813accc313f92fdb06e2340bcc65113d21425ced68731afa298ac259928ff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x746E 10392 bytes
font_03_sfnt_off000097a4.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97A4 4324 bytes

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