Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e6fec499c146ad…

MALICIOUS

PDF

44.5 KB Created: 2020-08-10 15:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d63d56a7d40b1ac8e619ee4801619bd2 SHA-1: aa0491f10efab1bd9dfa5d02565b86b34e5d5021 SHA-256: 06e6fec499c146adcfb27dc415e8148a9097b48b60f030751144b2ba460f62fc
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL 'https://ttraff.cc/pify?keyword=livro+boca+do+inferno+em+pdf'. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external PDF links, many of which point to potentially untrusted domains. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=livro+boca+do+inferno+em+pdf
    • http://gavut.michaelselma.com/uploads/1/3/1/6/131637136/vategazegipuguw.pdf
    • http://fumefuwuj.wyntrcardigans.com/uploads/1/3/0/7/130776485/1d89cb1083b03a.pdf
    • http://files.didsburyjuniors.com/uploads/1/3/2/6/132681824/maxipupamekep.pdf
    • http://didotix.rlbciviccenter.com/uploads/1/3/1/6/131636725/godijab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7512/5923/files/26419177427.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gojifazuxosupimuron.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/money_format_in_codeigniter.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5377/files/lists_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0434/5344/8358/files/introduction_to_genetics_and_evolution.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/aoac_official_methods_of_analysis_1990.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/55835396122.pdf
    • https://cdn.shopify.com/s/files/1/0428/2993/8855/files/pajimagafegedimujefewe.pdf
    • https://cdn.shopify.com/s/files/1/0430/0954/0257/files/vaparixarexarafukugigu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/92653896630.pdf
    • https://cdn.shopify.com/s/files/1/0434/5462/7993/files/binomial_theorem_iit_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/15794100407.pdf
    • https://cdn.shopify.com/s/files/1/0433/6294/3127/files/jotagodokomez.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_off00007092.bin
fab377989dea5140df1c51ddf21de24fda2e031500591aceaa11ecf1984cc7ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7092 5232 bytes
font_01_sfnt_off0000824c.bin
9128eb30b3e6f0b7f180e725d43b200d2d3fad143f7b5767f20470b0bca44b80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x824C 10040 bytes

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