Malicious PDF — malware analysis report

Static analysis result for SHA-256 df63c2cee9c63153…

MALICIOUS

PDF

47.7 KB Created: 2020-08-30 13:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 318b9ade4bab31c4f6801995937dabe5 SHA-1: b9b6af9543b2df252af8ec58b9f6ae1eeeffa1af SHA-256: df63c2cee9c63153ce356a8b03c41eac0dab5ef6b2af43bbbae506e19c90b174
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ttraff.com/wix?keyword=ddd+pool+1.2'. The document body appears to be obfuscated or corrupted, but the presence of numerous links points towards a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness.

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=ddd+pool+1.2
    • https://static.usrfiles.com/ugd/b8c837_aa6ee731d6694edf96ee2b7e268130ee.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a1e9ed9af8348829b09275e7dde7270.pdf
    • https://static.usrfiles.com/ugd/9c43ec_98e1f3b3ccac4b37ae603e66447f237c.pdf
    • https://static.usrfiles.com/ugd/ac72e0_ed488bfcd000436da762a7be6f957e84.pdf
    • https://static.usrfiles.com/ugd/b8c837_7082ac50ecb84d9a9bb8a8ea9224af53.pdf
    • https://cdn.shopify.com/s/files/1/0429/3797/4940/files/adobe_acrobat_reader_free_download_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0433/4066/0904/files/mojotigoz.pdf
    • https://cdn.shopify.com/s/files/1/0436/0319/8114/files/19253234322.pdf
    • https://cdn.shopify.com/s/files/1/0433/8135/8759/files/dieta_para_varices_esofagicas.pdf
    • https://static.usrfiles.com/ugd/b8c837_c0490332ced44525988ae3e4ed2cb481.pdf
    • https://static.usrfiles.com/ugd/bb13a2_0af101daa85f49e588107fab00f7a29b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b4b03884629341b3828cbef30e5734d5.pdf
    • https://static.usrfiles.com/ugd/cc10e7_d4ff8b761f784d0abedf9e07c7f2662f.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70998441087.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zizamazigunonafimav.pdf
    • https://cdn.shopify.com/s/files/1/0429/2280/3366/files/kakefolelig.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_off00006666.bin
d893354dc51f65cb9b2ef4f94117a191da37705d14c12574efe8a74e3c4bbeaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6666 4684 bytes
font_01_sfnt_off0000767a.bin
0e9ea085204a63f8a92313ebf8ae6994a92f4e5ea78ad9c70301cfae464dc1b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x767A 10188 bytes
font_02_sfnt_off000099a2.bin
4d480688fb86bf413fe23421adee234d3cb6cccc71d6c934cec57bd0bc046cce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99A2 16840 bytes

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