Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceed62a3dfff140b…

MALICIOUS

PDF

39.6 KB Created: 2020-09-03 23:18:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2033bdc371c25db47a3ab8651f8b54ba SHA-1: af070dd723c365cf76d897c424672cd1ce9d7819 SHA-256: ceed62a3dfff140b8c95f1e3915800e4171233eee5ab38fb4228f72e1a86975f
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains the URL 'https://ttraff.me/wix?keyword=mariam+khan+reporting+live+rehan+real+name', which is flagged as a malicious redirector. The presence of numerous links, including those hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to distribute malicious content.

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.me/wix?keyword=mariam+khan+reporting+live+rehan+real+name
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/98644194901.pdf
    • https://cdn.shopify.com/s/files/1/0435/0207/6070/files/jekunozowikalemixiped.pdf
    • https://cdn.shopify.com/s/files/1/0432/3534/4539/files/number_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/9236/8798/files/79552562660.pdf
    • https://cdn.shopify.com/s/files/1/0440/7823/5798/files/c_global_variable.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/wezepagak.pdf
    • https://cdn.shopify.com/s/files/1/0438/4836/8288/files/90328988726.pdf
    • https://cdn.shopify.com/s/files/1/0431/9153/3725/files/5374881446.pdf
    • https://cdn.shopify.com/s/files/1/0431/6548/3172/files/md5_checksum_verifier.pdf
    • https://cdn.shopify.com/s/files/1/0432/5136/8104/files/the_norton_anthology_of_short_fiction_8th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7106/files/51166969812.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/sedowatokubusona.pdf
    • https://static.usrfiles.com/ugd/b8c837_81dc683b970c48aca77afce710b8cbcd.pdf
    • https://static.usrfiles.com/ugd/b41a9a_a6d570bbbbb94cdb9d4563e90fa6d300.pdf
    • https://static.usrfiles.com/ugd/83f04e_f35e327cabd24f9d943caf014023f993.pdf
    • https://static.usrfiles.com/ugd/0b46e6_423beb8674cb44cf909cae9caa7947eb.pdf
    • https://static.usrfiles.com/ugd/52b593_d603c14aa7be49ab888976c40f3550f4.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_off00005b6f.bin
78f3522329968cc9d3646cb76194bc52c22887a9eef226522e80544dcdf9993b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6F 5184 bytes
font_01_sfnt_off00006d00.bin
791e665f3d6471f00c701f02af75db91cb63515a97d48d6659b17aa61b77b69b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D00 10828 bytes

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