Malicious PDF — malware analysis report

Static analysis result for SHA-256 0679ff4657d2f8ff…

MALICIOUS

PDF

42.7 KB Created: 2020-08-29 12:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d0502644263c8baf53e348056a78a2e SHA-1: 77c55cb89721a78071c85721b3accfef55600dc8 SHA-256: 0679ff4657d2f8ffad86b825af5dbee019821a8af39f4b89dff882383c334dfd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, 'https://ttraff.me/wix?keyword=vivint+solar+contract+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a 'Vivint solar contract pdf', indicating a social engineering lure. The presence of numerous external PDF links further supports the malicious intent of redirecting users to potentially harmful 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=vivint+solar+contract+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_37140dbfbf7247529503402fc294ea14.pdf
    • https://static.usrfiles.com/ugd/b8c837_b4904fb0ba084e1d9d91f1739727aeed.pdf
    • https://static.usrfiles.com/ugd/b8c837_73f27eb718514f14964a172096bfde1c.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4988329c7404ffa87ceea3411f0b592.pdf
    • https://static.usrfiles.com/ugd/b8c837_ccbb1ebdcb92465c8c27d17a6d91a253.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/29590177546.pdf
    • https://cdn.shopify.com/s/files/1/0433/4170/9462/files/25745216911.pdf
    • https://cdn.shopify.com/s/files/1/0437/3735/0309/files/bisebixemobov.pdf
    • https://cdn.shopify.com/s/files/1/0436/3629/3785/files/blogging_for_dummies_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/72957337257.pdf
    • https://cdn.shopify.com/s/files/1/0437/5920/6549/files/63866071830.pdf
    • https://cdn.shopify.com/s/files/1/0434/4800/8866/files/20433942414.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/contrato_de_arrendamiento_concepto.pdf
    • https://cdn.shopify.com/s/files/1/0437/1392/1189/files/dota_vods_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0437/7087/1970/files/discord_hyperlink_text.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/budget_management_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/4950/0328/files/sepodevasomone.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069c3.bin
3ef5946ee0413993d2f115ff9f0714b0a95a1449ed45e35b2bbd0925e2b42dee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69C3 5172 bytes
font_01_sfnt_off00007b72.bin
185f24b92396007ba3feae21555248a8e0b0770206bcbe5a74d55b324bd83f1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B72 10136 bytes

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