Malicious PDF — malware analysis report

Static analysis result for SHA-256 d279119cfb3f3e02…

MALICIOUS

PDF

48.0 KB Created: 2020-08-30 21:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a9eb76256670c924beb35134866b8c7 SHA-1: fcd43eaef578f498a79f5be02ce2bb178a45fa56 SHA-256: d279119cfb3f3e025533dec36dfe03b0a8cfe4840ca49f6686a67eb157c96247
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to external PDF files. One prominent link, 'https://ttraff.com/wix?keyword=bluebeam+crack+free', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'bluebeam crack free', suggesting a lure for pirated software. The presence of a malicious redirector and the nature of the links indicate a phishing or malware distribution attempt.

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=bluebeam+crack+free
    • https://static.usrfiles.com/ugd/724fb5_69d0b8bafbc24410a3bbd7816c3bc8cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_0152b6c1b64d441b896f505e0f1b241d.pdf
    • https://static.usrfiles.com/ugd/cac9e4_86a94886a4b141c6b5055a10341684e0.pdf
    • https://static.usrfiles.com/ugd/ed64d2_cdf5bde5d6664df1ae5806cc832008b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_c76a66380c9f4b50990411721f5d42fe.pdf
    • https://cdn.shopify.com/s/files/1/0437/6064/8343/files/all_blocks_in_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/toviluwonezi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/90679650619.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/nanukosidisaze.pdf
    • https://static.usrfiles.com/ugd/b8c837_19264833cbd04ddc9aec8a20a8d52c93.pdf
    • https://static.usrfiles.com/ugd/ed64d2_eded538c22f446b1b8c87c3cee0a54e8.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_off000072a6.bin
f647f30206b516475dd5282d0f04d5fa93a9c540211af49f58900fe7014db901
pdf-font-stream PDF embedded font (sfnt) at offset 0x72A6 4640 bytes
font_01_sfnt_off00008274.bin
731287579767503b1c189839898a6638a6bfd0bbed0cbeb229fbe73a15b54f60
pdf-font-stream PDF embedded font (sfnt) at offset 0x8274 10348 bytes
font_02_sfnt_off0000a5e3.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5E3 4324 bytes